The entire game is controlled by tilting your iPhone, slowly gliding your squirrel around the screen. On-screen buttons appear that allow you to quickly dive to gain speed, as well as jump off to keep flying when you eventually land. This control mechanic has been a major point of discussion in the Phoenix Spirit thread on our forums. Currently, only tilt control is implemented. I didn't mind the controls as I played through the game, but there seems to be quite a few people who dislike being restricted to tilt input.