Pirates, crayons, galaxies and picross grids populate this edition of Mobile Monday! If only they were used together in a single game. A space-themed picross puzzle where you make pictures of pirates using a crayon? I'd play it, that's for sure...

We're still giving away iTunes gift certificates to cover the cost of every game featured in the current Mobile Monday article. Simply sign-in with a Casual Gameplay account, leave a comment giving feedback about one of the games, then check back the week after to see if you've won. Simple! Congratulations to last week's winner, samalakar!

7 Cities - A nice classically-themed tower defense game where you fight off pirates out to loot the Seven Golden Cities of the Amazon. Eight unique maps, seven different towers, a slew of fantasy creatures (kraken, anyone?) and of course the ability to upgrade units. Towers have a unique skill tree that allows you to customize how you play the game: a heavy hitting powerhouse, or a splash damage frenzy?

Galcon - The classic Risk-like strategy game, in sci-fi space form. In Galcon your goal is to overwhelm your enemy by sending space crafts out to conquer their worlds. The number of troops on a given base is displayed in the center, all you have to do is swarm the planet and reduce that number to zero. Expand your empire, spawn more warriors, and own the galaxy. A free Galcon Lite is also available.

PicGrid - I'm a picross addict, and I've kept a sharp eye on the iPhone nonogram scene since the app store first opened. It's been disappointment after disappointment for a long time, and then PicGrid appeared. It's a no-frills presentation kind of game, but that simplicity is what saves it from the uninstallation graveyard. No sound effects, no music, the game doesn't punish you for incorrect guesses, and a basic iPhone-style menu system to navigate. Tap a square to fill it, choose the "X" and tap to mark as blank. Most of the puzzles are on the easy side, but that hasn't stopped me from squeezing a lot of enjoyment out of it. A free Lite version is also available.

Crayon Ball - A matching game with a little physics thrown in for good measure. Your goal is to get crayon-colored balls to huddle in groups of four or more. Tilt the iPhone left or right to shake things up a bit, and tap a ball to make it disappear. But be careful! Each time you tap a ball it increases the "danger" meter below. When the meter fills, your game is over. A handful of nifty power-ups spice things up quite a bit. It seems a very chaotic game at first, but after a minute or two of playing, you'll realize there actually is a solid strategy behind those colorful orbs.

NOTE: Games listed may not be available outside of North America. Prices are subject to change and are therefore unlisted. Please see the individual game pages for purchasing info.