CJ:Strike Back is a fun endless running game set in the future.
You play a superhero who has to prevent the city from being invaded by aliens. You do this by climbing up the walls and smashing the aliens and robots who get in your way. Simply tap the screen to spin from one wall to the other, crushing anything you hit in the air. Be careful you don't get hit by the aliens, though.
Although not amazing graphically, CJ:Strike Back is fun endless runner which keeps you coming back for more.