This game just entered the top 200, and oh wow is it good! HIGHLY recommend it on the iPad. Even better when you put it directly in your face (I'm serious!). The colors, the music, wow. https://itunes.apple.com/us/app/warp-tunnel/id525921212?mt=8 There are gesture, gyroscope, and tilt based controls to choose from. Small IAP, but not needed to advance really.