Notebook Wars 2 returns you to the world of sketch-drawn ships and fighters in an epic vertical shooter by Francisco Ferreres and Dream Forge. Control one of ten hand-drawn ships across 13 levels that look like something out of a teenager's sketchbook. Blow away the bad guys to earn cash to upgrade your craft and fly to victory.
You'd think it'd be clear by now that you shouldn't pick up a shiny gem when the statue holding it warns you of a curse. Sadly, Cactus McCoy, the titular protagonist of the new platformer from Flipline Studios, does just that, and the result is that he's been transformed into a walking, talking, punching Saguaro. So now, if he ever wants to make balloon animals again, he must return the gem to its proper location across the beautiful landscapes of the old west... all the way pursued by the mercenary gang that hired him to swipe the gem the first place. An excellent game for fans of westerns or beat-em-up adventures in general.
The winner of the 2011 Stanford Hackathon represents the theme of benevolence by putting you behind the wheel of a truck making deliveries for the local food bank. Stop in as many green areas as you can before time runs out to earn cash to upgrade your vehicle in simple ways. It's a simple but solid step in the right direction for new developer JacobG, and as his prize included a review by us, we talk about what was done right, and what could be improved.
Play a grim, roided-out minotaur in spandex briefs, kidnapped by the fascist oligarchs of Candyland to fight in their gladatorial combats, and resolved to launch himself with the combat ring's elastic ropes and propel himself to freedom, via grit, rocket shorts, and the gummi, pliable sproinginess of Candyland's fleeing citizenry. Top that, future launch game developers and purveyors of the bizarre!
GemCraft returns with this latest installment in the popular series that blends RPG elements with strategy and classic addictive tower defense. Descend into the labyrinth for your greatest test, with more skills, more achievements, more abilities, and more of the classic action that GameInABottle has perfected.
When a seed meteors into the ground, it finds itself in hostile terrain. Nasty-looking plants sit nearby, easy to provoke by the slightest bit of resource gathering. Defend your plant from the invading species in this fun take on tower defence games. You might even learn a thing or two...
If there's one sci-fi rank that has the highest level of awesome associated with it, it's "commander". Some of the greatest protagonists of all space-time have it appended to their name: Riker, Sisko, Adama... Keen. So it's only fitting that when puzzle-master Johnathan May chooses to surprise us with rocking a vertical-side-scrolling space shooter, that he should dub it Cosmic Commander. And let me tell you, it has a challenge more than worthy of its station.
Cactus takes weirdness to a whole new level in this game about car racing without any actual cars. Play as a naked man who just thinks he's a car, racing against other like-minded fellows, through this retro game that's weird, funny, and just plain weirdly funny from Adult Swim and the developer who brought you Stallions in America.
Icy Gifts has you freeing frozen presents using chain reaction explosions. It doesn't have a huge challenge or innovate in the genre, but it is a solid package. The visuals are slick and the soundtrack is pleasant. There's enough variety and objectives to keep a completionist busy and a causal gamer entertained. Consider this a late Christmas present.
First impressions count for a lot. In the case of Soul Redeemer, the new top down zombie action shooter by the Bekho Team, it introduces itself with a plot-explaining narration that cracked me up, though I don't think it was supposed to. Still, whenever a game starts by expounding on how, every couple centuries or so, the alignment of constellations somehow release demonic forces to eat our souls, and the only thing standing in their way is a warrior dude in asymmetrical armor shooting stuff... I'm going to stay around. And I'm glad I did! While Soul Redeemer is not the most original of games, it has a charm to it that fans of the genre should enjoy.
The goblins are mad as hell, and they're not going to take it anymore! After years of humans stealing goblin inventions and claiming them for their own, the goblins are ready to strike back by constructing an impressive (if somewhat unsteady) goblin powered war machine and rolling through the countryside. Crush the human resistance, earn upgrades and highscores across eighteen levels in this silly, bouncy action physics title from Big Block Games. Whose side are you on?
Warning Foregone is an addictive little pixelated shooter based heavily on previous games while managing to stand on its own. Featuring an evolving boss, several weapon upgrades, and achievements galore, Warning Foregone with feel familiar while driving you to see just what kind of boss evolves next.
A three phase fishing game from Vlambeer. First, cast your hook into the water, avoiding fish as you head deeper and deeper. Second, snag as much sea life as you can as you reel your hook in. Finally, fling them into the sky and use your weapons to blast them into sushi. An over-bloody and surreal, but quite addictive time.
Fancy taking a mining convoy for a ride through underground tunnels? Can you do it fast and still get all the goods there? You're hired! Develop a case of slowly-rising blood pressure in developer AntKarlov's gravity-bound physics arcade game. The taste of success is worth it.
Fire! In the Diner! Fire! In the Cake Factory! Another spree of accidental flame outbreaks is afflicting the land of Casual Gaming, and its once again up to the little robot fire-fighter that could to put them out. So is the premise of The Podge's puzzle platformer sequel, Inferno 2: Meltdown.
Immortal Souls puts you in the role of John Turner, a street racer-turned vampire who out to protect New Haven from the forces of darkness. This comic-book like, turn-based RPG has detailed art and animation to go with its numerous epic battles. Can you help the forces of light overcome the forces of darkness?
In Blue Knight, you control a human sent to purge a planet for future human colonization. This retro-looking platform shooter has you jumping and shooting your way through a large world, collecting powerups and facing off against various bad guys on your way to the final boss.
Bubble Tanks 3 takes the series to new heights by combining the best of the Bubble Tanks core gameplay with the customizing features from Bubble Tanks Arenas. The result is a solid sequel to a very popular Flash game series that's a lot of fun to play. The campaign is solid, the user-created tanks keep things fresh and the enemy editor is a ton of fun and will keep this version of the game living for a long time to come.
A defense shooter release from Evil Dog and Sick Death Fiend. Tis the night before Christmas, and all through the house, not a creature is stirring, save for the hordes of demon-possessed toys that have found their way under the tree, ready to devour the sleeping bodies of Mom, Dad, and little Timmy. The only thing that stands in their way is you, your hammer and lots of tacks, a ball, a whip that cracks, and a plethora of other gift-weapons. It's six hours until sunrise, with waves of toys coming every ten minutes... as Tiny Tim would say, God help us, all of us.
Just a quick update to say that we have been moving a lot of our bandwidth-heavy content (images, hosted games) during the past few days to a content delivery network to help the site load faster. We were hoping this would be completely transparent to you, the visitor, and that we wouldn't have to bother you with a note like this.
Control a paper plane bound for the North Pole in this launch game that combines fast-paced gameplay and a whole lot of charm with an extremely clean design. Catch shooting stars, paper cranes, and fight hazardous wind conditions to reach your destination. All one little girl wants for the holidays is to see her mother again, so she jots Santa a letter and tosses it out the window as a paper plane. When it winds up in the hands of different people who all want different things all over the world, will anyone get what they really want for Christmas?
The pixel world inside your computer needs your help in this top-down retro shooter from Irsperanza. Customize your tank and weapons as you mow down wave after wave of enemies. If you might enjoy enjoy skulking around an arena, dodging bullets, seeking out waves of baddies, and upgrading a puny starter tank into a mighty juggernaut, Shoot Pixels will make for some high quality low-rez action.
Today we launched a new banner game for the site, created by Mike Hommel of Hamumu Software. Mike is the author of the entire Robot Wants series of games, and this game plays very similarly to those. The objective is to light all the letters of the Casual Gameplay logo, as well as find all the JIGman bits scattered around the game. Sign in with a Casual Gameplay account and collect all the letters and JIGman bits to get your name added to the Hall of Fame!
Help a little robot get his life together in this melancholic Metroidvania platformer from Tony (Antony Lavelle) of Armor Games. Explore an ominous facility under the purview of your disappointed computer mother, gathering upgrades and fighting fellow robots. Worth the initial weirdness for a quiet gem of an experience with a surprising amount of depth in its simple design.
When there is no more room in hell, demons will walk the earth, stealing soft plushy toys so you can't use them to find your daughter, unless you use a combination of platforming and defense to stop them... that's, uh... how that goes, right? Nerdook delivers another clever genre hybrid, this time putting you into the shoes of one weird dad trying to save his daughter from even weirder enemies.
A Gray-Haired Science Guy has been ordered by his government to launch a rocket straight to the moon in Barbarian Games' new take on the launch action genre. Using Keyboard or Mouse controls, steer your craft ever higher, picking up bonuses and adding upgrades until you reach the ultimate goal of 300k feet. The countdown awaits!
There's a new science hero in town! Ray Ardent: Science Ninja is a solid platformer with a nice coat of polish that sets it apart from the rest, and it uses its hilarious concept to full effect which helps makes it a memorable game. Platform fans should certainly give it a shot.
If you've always wanted to go into space but golf wasn't your cup of tea (HA!), then try out this new spin on FunkyPear's physics series! Utilize the gravitational pull of planets to help you take out the opposing team in this turn-based game of space warfare. Unlock new weapons, earn achievements, upgrade your troops, and try to do it all under par.
For those of you thinking your prayers for a fantasy-themed game based on the classic novel and movie "Logan's Run" have been answered, you'll have to keep waiting. Wizard's Run is, however, based on the concept of wizards combined with the concept of movement towards things and with an overall killing things theme.
Everyone's had problems with their neighbors at some point. From the party guys who blare music at 3 a.m. on a Monday morning to the lawn dictators who go berserk if your grass gets too long, bad neighbors are a fact of life. In Nerdook's latest strategy game, Deadly Neighbours, you get to deal with your neighbors in the most direct way possible: by beaning them in the head with a PS2 controller!
Coaster Racer is a first-person racing game where you compete against 16 other off-road race cars across eight elevated rollercoaster-like tracks. Complete each track as close to first as possible, or at least qualify to unlock the next track. Along the way, you can pick up cash on the course and finish races to earn money for upgrades and repairs to your racer.
When the army tries to lock down a city during a zombie outbreak, one lone mechanic decides to make a break for it. In this clever take on the driving genre, try and make it out of the city alive, racking up kills to upgrade your car and trying to stay one step ahead of the army. Turns out the military doesn't appreciate someone trying to escape a quarantine zone. If they have their way, the only way you'll be getting out is in a body bag.
Who hasn't wanted to fly? I'll tell you: penguins. They're perfectly okay with staying on land. You'll never see a penguin in an airplane, that's for sure. For all the rest of us who'd love to take to the skies, though, there's Wings of Ge.Ne.Sis, the new side-scrolling shooter from An Lieu. While the original Ge.Ne.Sis was a console-style RPG, this spinoff takes things in a whole new direction; namely, up and above!
Poor little Pichin can barely manage a jump, and apparently this fills its creator with disgust. In Reachin' Pichin, the debut from Malaysian game makers Kurechii, a sympathetic lab assistant helps Pichin launch up into the sky, grab all the money and gems conveniently floating around up there, and use them to evolve into something that will make its creator proud.
Notebook Wars is a top-down, vertical scrolling shoot-em-up with personality and charm. It starts out a little slow, but it's not long before it picks up the challenge. And while the art style may be the main attraction here, the relaxed and casual shoot-em-up gameplay paired with lots of upgrades to outfit your ship with together make this little shooter shine. If you're looking for a nice and enjoyable, cool looking side-scrolling shoot-em-up, it'd be hard to go wrong with Notebook Wars.
After kitties, puppies, and fishies, Robot has finally figured out what he truly wants... ICE CREAM. But when he and his trusty Puppy arrive on a planet in search of some, he finds the situation a bit more explosive than he anticipated. Battle bosses, collect power ups, and explore in this wonderful finale to the hit platforming series from Hamumu Software!
Gunbot is a platformer/shooter from Berzerk Studio where you'll do the usual robot stuff, like collecting stars and shooting dinosaurs. As you take down enemies you'll get experience to level up with, and you'll gain skills like double jump or firebomb. Your foes also drop money which you'll use to buy guns. Gunbot has pretty much everything you could ask for. It's funny, the difficulty increases smoothly and the gameplay is fun.
The latest in the Protector series from Undefined might not be what you expect, but it still has all the strategy and fantasy you love. Use your tower defense skills to defend the adorable land with your adorable warriors against the adorable forces of darkness. Trust us; it's adorable.
The fictional land of Pixela-RT witnessed years of prosperity. Now, a dark portal spews forth endless waves of Space Invaders inspired monsters intent on destroying all that is good and pixely. Luckily, volunteers from across the land take to the sky in small white spaceships to fend off the menace. Endless waves of enemies face down your small white ship on an apocalyptic top-down battlefield in this arena shooter from Epic Shadow.
Ah, the cosmos. It contains the whole of everything that is, was and shall be. It is filled with the awe-inspiring beauty of the nebulae, the quasars and the familiar stars. Science cannot know how big the universe is, nor can it count the number of planets or star. Every time we get close to an exact figure, a giant space whale, dubbed Harmony Keeper, starts devouring celestial bodies. Or at least, that's what this latest action/arcade title from Mofunzone teaches us.
What's not to love about this fantastic sequel? The kicking retro graphics, the astonishingly nostalgic music and sound effects, everything adds up to tons of fabulous casual gameplay. Enjoy the new challenge, the new enemies, and the same fantastic warm feeling as you help your lonely robot find yet another friend. And not to spoil the ending, but it turns out that Kitty really wants Fishy too. Maybe the honeymoon isn't over after all.
With trolls on every side and the nearest kingdom over 50,000 feet away, what's a king to do? Well, you could make peace with your deities, try for a valiant final stand... or you could load your unwilling populace into a questionable catapult and fling them through bombs, spears, birds, and enemy forces to try to reach help, no matter how many civilians you have to splatter along the way. I think you know what the responsible thing to do is.
Zombies to the left me, er, zombies to the right. Here I am, stuck in the middle with two AK-47s, three primed hand grenades and one dog with a mini gun on his back. Get ready to take survival to a whole new level in this top-down shooter! With steak!
Hook up a few pipes and get that water flowing in this take on a very familiar, but equally popular puzzle genre. Aqualux is all about twisting and fitting pipes together, opening the tap and seeing all your work go the drain.If you played anything called Pipes, Plumber, Pipe Works, Pipe Dreams... you get the gist, you'll know how this works. You have a tap on one side and a drain somewhere else. By rotating and swapping pipes, depending on their type, you create a route to the drain, slap open the tap and watch your handiwork waste valuable aqua.
Think you're ready to work at the lab? Think again. B.O.B, our resident A.I., has turned on HQ, and we'll need you to strap into this giant mech and hold off his minions long enough for you to destroy him in this fast-paced shooter/defense game. Rampage around an enormous city map, but don't worry; it's just a simulation... right?
If you are going to steal a man's chickens, make sure he doesn't have a shotgun, a magic feather and a flying sidekick... or an action/platformer from Juicy Beast to star in. The latest and greatest incarnation of Dale and Peakot features overhauled levels, new stages, gameplay tweaks, and more.
Global warming is going to be our undoing, but not because we will suddenly run out of polar bear pelts or ice for our afternoon drinks. Thanks to raising temperatures, more ice starts to melt, unleashing a virus that has remained frozen for millennia. But this is not any virus. It is alien in origin and it plans to evolve and destroy us. It is also intelligent, because it is who you are in this action/strategy game.
We didn't start the fire, but we will be sending in a robot to take care of it in this puzzle platform game. for some reason someone thought one robot would be enough, which is where you find yourself in Inferno, where keeping the fire at bay is a matter of speed, guile, planing... and coins.
Have some mad scientist tendencies? That's okay, so do the folks at Hero Interactive, which is why they've decided to let you loose on this arena shooter based on the popular Bubble Tanks series with some serious customisation power. Build and edit your own tanks, enemies, and arenas as you unlock new parts, and upload the results for other players to enjoy!
Being bad is hard to do! Tasked with raising the monstrous horde and overrunning the kingdom, it might seem like a done deal. After all, the stories you usually hear is about how hard good has to work to overcome evil. Crushing the kingdom under your evil army's boot heels is as much fun as it sounds in this strategy game.
Robot's at it again; armed with a kitty perched atop his boxlike head, he's off to get himself a new friend in this follow up to the surprise smash-hit original retro platformer. Gather keys and unlock the mighty (mighty weird) abilities of your feline companion to eventually win the day and the puppy.
Ready for a blast from the past? Pixel Basher is a Breakout clone with a slick new look, new upgrades, and new backgrounds. At only nine levels, it won't keep you busy for long, but it's fast, addictive fun for those of us who remember when an arcade was an actual thing you went to rather than just "That thing old uncle Bob keeps talking about whenever I fire up the console".
Hands off my gems! Well, actually, I guess they're your gems, but you can't blame me for wanting them. Everyone else does, too; from ninja to monks to mages to heroes, everyone is marching on your horde, and it's up to you to utilize three distinct armies at your command to stop them. Gain levels, upgrade abilities, and above all else, protect your treasure!
From the creator of The Company of Myself comes an arena shooter with a surprisingly deep message at its core, offering food for thought alongside fast-paced gameplay. EXADI is a highly advanced artificial intelligence who needs your help to recover her systems after the assault of a particularly nasty virus. But where did the virus come from? And just what makes someone human anyway?
Like being king of your castle? Best keep those orcish hordes at bay with a bit of fighting, building and training. But mostly fighting. After planting his castle on what might have been the resident sacred patch of land, a knight is facing wave after wave of orcs keen to remove him from the local scenery in Ninja Kiwi's interesting defense/hack-and-slash twist.
Genu is back and wants his revenge! Who's Genu? Who cares! It's another excuse to pilot overpowered, flashy spaceships against legions of enemies in this fast-paced shooter full of big bosses, big upgrades, and big fun. While not quite perfect, it's an enjoyable and challenging space adventure for every fan of lasers.
Where oh where has my kitty cat gone? Only robot can find out, and it's up to you to help him get there by guiding him past hazards and to power ups, keys, and ultimately kitty-cat-havin'-glory in this retro-themed, pixel platform adventure.
Martial artists have for centuries honed their bodies, minds, and souls to the very height of human potential. Entire lifetimes are dedicated to the understanding and perfecting of the human form and all for one very distinct purpose. If the new launch game, Mad Karate Man, is to be believed, then that purpose is to waylay cell phone yapping, briefcase lugging, penny-loafer on casual Friday wearing businessmen, and kick them so hard they actually go into orbit.
With a special ship and enough firepower to sort out the 100 year war in an hour, head to the skies and dodge bullets.For whatever reason and whichever tactical handbook involved, you are heading into space to shoot down a colourful variety of enemy spaceships, always culminating to fighting a huge boss ship at the end (Come to think of it, why does the boss always fight alone.. you know what? I don't care).
Take control of a flock of Canada Geese and fly for as long as you can, gaining more birds to increase points, and avoiding their natural predators. Like propellers. With upgrades to buy, achievements to discover, and high scores to capture, Endless Migration is a solid, if repetitive, avoidance title for the goose in all of us. HONK!
In Abduction!, the goal is to make your bloated overlords cold, hard cash by journeying to Earth and picking up a few (un)willing volunteers to be the supply for your demand. It's the perfect game for those of you who hate overalls and straw hats, and believe anyone who wears them should be punished. Sucking a fleshy creature aboard your ship causes horrible yet delicious things to happen to them as they're processed into Man-in-a-Can.
Injected with adrenaline, heavy metal, and buckets of (tiny, pixelated) gore, Juggerdome is a gritty top down arena shooter from Con Artist, creator of Crush the Castle. You are the lucky prisoner chosen to pilot the Juggernaut, a killing machine outfitted with upgradeable weaponry. During each round in the arena you must not only survive onslaughts of machines and armed prisoners, you have to entertain the crowd, too.
Get ready for a robotic destruction derby of vast proportions, as you blast, shock, and, um, "tickle" your way through 23 levels of fleshy foes who'd love to take you apart for the scrap metal. Hold down the mouse button to activate your super-extendable tickling arms, redesigned with slightly less giggly purposes in mind, and let no man, machine, or anything else stand in your way.
Frantic 2 is as calming as a warm, lilac scented bubble-bath on a late summer night. Assuming your idea of calming is a screen filled with dozens and dozens of enemies, projectiles, power-ups, and laser fire. With three big levels, five modes of difficulty, upgrades, and more, Frantic 2 is prime scrolling shooter action for the twitch gamer in all of us.
The tender story of a boy, his bow, and all the monsters that needed to be shot full of arrows. Medieval Rampage 2 is a top-down shooter chock full of upgrades, arrows, achievements, arrows, and fast-paced action across 25 levels and impossible odds. What it lacks in strategy it makes up for in action. Also, arrows. We can't stress this enough.
Look, up in the sky! It's a bird! It's a plane! It's a robot bicyclist free falling down a cliff into a pit of lava! If you think that sounds far too silly, you may not be ready for the sort of freewheeling craziness CycloManiacs is here to dish up. Featuring 20 different riders, unlockable stages, achievements, upgrades and more, it's a fast-paced racing game of a different breed.
Who could ever be satisfied just upgrading weapons systems and defensive towers? In Upgrade Complete, a shooter from Tony of Shift fame, you can upgrade practically anything you can think of. The title logo, the menu screen background, the user interface buttons... and oh yes, your weapons systems, too. How fast can you upgrade everything?
The neighborhood kids are on your lawn again, and it's time to take action. And that action is murder. In Get Off My Lawn, you finally decide to put an end to all the shenanigans, armed with the oversized blades on your trusty, indestructible, probably non-regulation, rotary lawn mower.
Neuron is an arena shooter battle between you and a multitude of evil, evil circles. Enemies spawn around the arena in waves, and your job is to kill them dead before they do the same to you. Kill or be killed, seems simple enough right? Now add in achievements, upgrades, perks, and particle effects a-plenty.
It's mightily easy to care about your tiny walking soldiers in Warfare 1944, the new real-time strategy game from Con Artist. They fall prone under fire, they take solemn aim, they dolphin tragically through the air when a mortar strikes. Your mind's mission may be to win the war, but your heart's mission is to protect your men. That's quite an accomplishment for a little Flash game.
Continue the fine, respected tradition of launching small creatures heavenward in this spiney sequel to the original Hedgehog Launch. The addition of new items to get and a slight graphical improvement wind up making this one feel like the game the original should have been, rather than a new game. Is it fun? Oh yes!
Starcom is a top-down space shooter and strategy game, with subtle RPG elements like a well-paced story progression and "missions." You are stationed aboard a Galactic Command Starbase (space station), playing the role of a space fighter pilot with a starting mission of fending off alien attacks. Starcom really shines, revealing story elements at just the right moments while incorporating it all into the gameplay progression.
Hedgehog Launch puts you at the helm of a national space program with a singular goal: get off the planet! Unfortunately, you're expected to accomplish spaceflight with $50, a slingshot, and an infinite supply of hedgehogs. Luckily, Minovia Cay is the kind of place where money falls from the sky! Or at least hovers in the atmosphere just waiting for you to snatch it.
Proo, a mischievous but good-hearted little girl who accidentally crash-lands her father's spaceship on a bizarre planet, must relearn basic skills like walking and jumping in order to navigate an enormous and beautiful world. With rising plumes of energy that can lift you to new heights, streams of red-hot lava that cascade into underground pools, and adorable pixel art, Pieces fulfills in ways most unexpected.
Have you ever wondered about what happens to all the bling that gets lost in the Bermuda triangle? Wonder no more! Treasure Seas Inc. is a business that makes its profit looting the submerged caves of a remote archipelago. This game will have you driving a cruiser around, submersing a sub, and looking for treasure. Treasure buys upgrades that allow you to explore further. It's like Metroid at the waterpark!
Imagine the wandering ball of Within A Deep Forest encased in metal and set loose in your browser, and tell me you don't want to get into that Sky Tower. Bug Bug is the latest game to be released from Aqui Griffin's studio, a re-release of a game entered into our "ball physics" game competition in October with crucial improvements.
MAD: Mutually Assured Destruction is a souped-up rendition of Missile Command with great art by Brad Baum and clever resource management design by Nic Daniel. Shoot missiles in an attempt to intercept other missiles, just like in the classic arcade game, but with a twist: Each missile you fire garners some resources that can be spent to upgrade buildings.
Ever feel like you are only one little super powered beetle against an infinite horde of other super powered beetles in an epic battle for survival, power and gold? No? Well, now you can get just that feeling in Beetle Wars. Your goal is simple: Kill all the other beetles and insects around you without dying; how you achieve that goal is not so simple.
Tanks features classic projectile gameplay in a Flash game package that ups the ante with tank, ammo and weapon upgrades, and even multiplayer action to boot.
XGen Studios is behind this Flash game that is reminiscent of the old-school arcade games Dig Dug and Boulder Dash. Hired to mine the dangerous planet of Mars, you are given a robotic mining pod and sent off on a mission to bring home the Motherload, a fabled cache of rare and valuable minerals. Dig far below the surface of the Earth to earn money for upgrades and find treasure.
An odd and addictive little game of violence against stick figures intent on invading your castle. From what I can glean, the gameplay has some depth by allowing you to purchase additional units and upgrades between levels.