Shadow Battle is a 2D fighting game where you play mysterious characters whose identities in reality are pretty obvious. Basically, all characters are darkened, as if they were covered by a black shadow, but it's easy to see who they are: Goku, Freezer, Iron-Man, or Hulk, among others. Each one has its own special and exclusive abilities.
Shadow Battle's combat system is very well-adapted to touchscreens. To move your character just tap the part of the screen where you want it to go, and to attack tap on the enemy. Holding down your finger on the screen charges up your attack to make it more devastating.
In story mode in Shadow Battle, you can face more and more powerful enemies, allowing you to eventually unlock new settings. Plus with the experience you gain you can buy things to improve your character.
Shadow Battle is a 2D fighting game with precise controls and nice graphics. It would be even better if instead of silhouettes the game showed real characters, but then it probably wouldn't be very legal.