Pretty Pretty Bang Bang

will at times collect MORE hit points every time a green ball hits it!

The bosses just start repeating after Inquisitor, all named Redundant Duplicate. Bipolar loses his text but retains his behavior.

Red dots appear in the very center. You have to detonate four of them. If you have seconds to spar you can just blow yourself up near the corner and skip through to the center before you re-form, then blow yourself up again.

It involves the purple star in the middle before the explosion.

Running over the star gives you 20 seconds. So you can essentially just sit in the middle and wait since it comes quite often. But be careful, if it explodes on you, every single purple ball takes away time. But really, it's not hard to do.

1. Hairdresser Corndog-it keeps on spinning, so a bunch of chain reactions will shape it up.
2. Bumbershoot Evangelist-it goes on a four-clover movement, but other than that, it's easy.
3. Underwear Ventriliquist-this thing goes on a wavy movement, as read on the site. What's worse, it creates underwear projectiles. Those are the things launching purple balls. I suggest take close shots.
4. Aromatic Syncopath-these are three seperate balls that launch blue balls. And you know that many enemies=many projectiles. But don't think that you should beat them seperately. No, just hitting one will do. Also, it's the weakest boss...EVER! It's HP is 50!
5. Suffocation Cheesecake-this one brings a new meaning to "size doesn't matter". It's small, but has a full health. If it doesn't bring change to the board, it would be a lot easier...this shrinks the space on the board! If you could survive the crushing, you're one lucky man.(Honestly, I ran out of time just before facing this)

There is no randomness in the game. Enemy sprites "loop," by which I mean that they leave the screen on one side and appear at that same spot on the other side. The important thing to remember is that green and purple balls, when they loop, come back as red balls. That's the key to the game, the first circle you blow up starts the cycle of red balls appearing.
When you blow up a red ball (and there is no boss to fight at the moment), it turns into two green balls that fly out and loop as red, unless there are too many red balls currently in play, in which case it just disappears without making any greens. The object seems to be to keep the number of enemy sprites on the screen in roughtly the same region.
When you blow up a red ball and there IS a boss to fight, it turns into one green ball that flies in the direction of the boss and attempts to strike it. However, it does not home in on the boss if the boss moves, and if it misses, it will fly off the edge of the screen and loop red again.
Purple balls can hurt you like red balls, however unlike red balls, they cannot be destroyed. However, like green balls, they LOOP red, and then they can be destroyed. Given that bosses spit purple balls at you exclusively, this is important.

Chain reactions. These are important because the more balls explode, the greater your score, and you gain five seconds on the clock every time your level score is greater than the cube of the total number of five-second bonuses you've reached during this level plus the level number.
In other words, x is the number of five-second bonuses you've reached since the most recent boss was defeated, and y is the level number. (x+y)^3 = z. Any time your level score (the score you've accumulated since the last boss battle) is higher than z, five seconds are added to the clock.
The trouble is that once you blow yourself up, you cannot voluntarily blow yourself up again until after the chain reaction has subsided. However, you can still blow yourself up by steering into a red ball. This takes a 10-second penalty instead of 5, but at times it could be worth it to prolong a combo that is about to fizzle out.

To get each boss to show up, you need to get 1000 points times the level number. If your level number is two or higher, each 1000 points you get in the meantime triggers a "shooting star" that gives you ten seconds, and spits out a circle of purple balls.

The third way of gaining time is to defeat a boss, which gives you fifty seconds.

"HAIRDRESSER CORNDOG": A long corndog-shaped boss that just sits in the center and spins around, shooting out purple balls. Um, just avoid the purple balls and blow up around the red ones to attack it.

"BUMBERSHOOT EVANGELIST": A boss that looks like an umbrella, that spins and flits around the battlefield, shooting out more purple balls. This time you must avoid the boss as well as the purple balls, but fortunately it moves in predictable patterns. Repeat the process of blowing up around the red balls. They come in set waves this time, so it's easier.

"UNDERWEAR VENTRILOQUIST": This boss flits back and forth at the top of the screen, shooting a blue plane-like object in your direction that spits out purple balls behind it. It's important to move to avoid the plane, which is aimed right at where you are when it comes out from the boss. The purple balls come in set waves, but the direction is a little harder to predict since where the boss spits them out varies. This is an excellent opportunity to make long chain reactions, just hover at the bottom of the screen and blow up a red ball to start a chain reaction. As the balls fly upwards towards the boss, a lot of them will miss because the boss is always moving back and forth, and as the balls loop red and also fly up, they will move right into the explosions caused by the balls and start into a cycle of explosions. I once got a chain of 350 while fighting this boss. The downside is it will take a while, but with all the five-second bonuses you can get, that will offset it.

"AROMATIC SYCOPHANT": Three small spheres that orbit each other in a triangle fashion and float around the screen. They take turns firing, each one of these spits two purple balls in opposite directions. The red balls move rather unpredictably this time, but you can still rack up a nice combo by hovering at one side of the screen and blowing up red balls there. Note that it's not always a bad idea to avoid getting blown up involuntarily, in order to prolong a combo that is about to go out.

"SUFFOCATION CHEESECAKE": No, it's not strangulation pr0n, it's a small spherical boss that sits in the middle and spits purple balls at you. Note that this is the only boss other than the Underwear Ventriloquist that actually aims its weapon directly at you, the others just spitting them out in preset patterns. However, the real problem with this boss is that it shrinks the available space on the screen, the screen gets smaller and smaller. You have to move fast. Trying to set up large combos is not a good idea. This is the hardest boss in the game, at least I think.

"OVIPAROUS AVOCADO": This rocket-ship-shaped boss is the only boss so far that doesn't use purple balls as a weapon, instead it travels in a circle around the screen, laying a circular trail of red balls. This one can rack you up a pretty nice combo, just hover behind it as it lays its first red ball and blow that up and it starts a chain reaction with each successive "egg" getting blown up the instant it's laid. Just start this, sit back and watch.

"BIPOLAR RHINOCEROUS": This is one of my favorite bosses of any game ever. At the start it's a happy face that just sits there with some blue text spinning around it that reads "I THOUGHT WHAT I'D DO WAS I'D PRETEND I WAS ONE OF THOSE SHOOTING GAME BOSSES" and spits out purple balls in circles. Just start a chain reaction and wail on it. Then it spits out more and you can repeat, but do it quickly, because it's about to flip upside down, which makes it an angry face. Now, there is no difference in behavior, it still sits there and spits out purple balls just as before, however, now the text around it reads: "NOW I GAIN HP EVERY TIME YOU HURT ME" and it's telling the truth. If you hurt it now, its HP goes up instead of down. Now, avoiding hurting it is not as easy as it sounds, because there are red balls flying everywhere, and hitting just one of them is enough to start a chain reaction that will restore a LOT of HP to the boss, and what's more, it starts out with 100 but it can actually go a lot higher. So, it's more important than ever to literally avoid every single one of the enemies until the boss goes back to its happy face.

"INQUISITOR WHIRLIGIG": There are no purple balls, or red balls, or green balls to use against this boss. The only way to attack it is to blow yourself up right next to it, so your explosion strikes it directly. Given that it's just a small eye-shape that sits in the middle of the screen, that shouldn't be too tough, right? Wrong. The boss projects out a bizarre shape etched out of blue, one that cannot be harmed and blows you up if you touch it. If you get hit by one, it sends out another one, so you can't just plow through and hope you have enough time left. These shapes fill up most of the screen. They are, in fact, mazes, that you must navigate through to get close enough to the boss to attack it. Since there are no red balls to use for combos, you have no way to regain lost time, so this is sort of a test to see how much time you have left here, at the end. Fortunately, as hard as it is to get to the boss, it only takes a few hits to kill it.