Crush The Castle: The title is self explainatory. The full version is either $0.99 or $1.99, but the game is worth the money. You use a catapult and use different types of weapons to crush many castles, play other peoples, and build your own.
Space Deadbeef: Space Deadbeef is a game that will keep you hooked for hours. This game has someone stages, I have yet to complete them all. Im on Stage 3-16, and I can't stop playing it.
Tap Tap Revenge 3, 2, & 1: This series is like Guitar Hero or Rockband on the go. Take it with you, download songs to play, and rip through them. There are so many cool features about this game.
Megaman II: Relive the ****c 8-Bit Megaman in this fun and exhillerating game. This will keep you hooked as you progress through Dr. Wily's robots he made to counter Megaman. Try to defeat them all and win the game.
TapDefense: If you haven't played Balloon Tower Defence 1, 2, & 3, I recommend getting this game. It is completly free, and fun. With 5 different types of game modes, matches, and ****, it will get you hooked.
Battle Bears: The title is odd, right? No, not for this game. You're a bear who has stolen goods from the Pink Bears and must return back to base. Your vehicle breakes down, leaving you in the open. You must establish a bunker and defend yourself.