Doodle Jump is a platformer with a doodle character that jumps on platforms. The character moves horizontally by tilting the device and jumps automatically on platforms. The character can shoot by tapping the screen. The game has power-ups, themes, modes, scores, achievements, and leaderboards. The game is endless and has obstacles and enemies. The game uses physics, graphics, sound, and input libraries. The game is fun and addictive.