Doodle Jump (Wikipedia), is a platforming video game developed and published by Lima Sky. In this game, the aim is to guide a four-legged animal called "The Doodler" up a never-ending series of platforms without falling. The left side of the playing field is connected with the right side. For devices with an accelerometer, players tilt the device from side to side to move the Doodler in the desired direction.
This is an open source project, you can download the game to play, or get source code on github.