Move with the arrow keys, collect food, and throw it with spacebar. Hold down to drop through platforms. Change stage before clicking "GO!" with the "Stage" variable. Different food does different things.
I am for some reason unable to get rid of the variable "Stage: Stage:" It is extremely annoying, and if someone can find out how to fix it, I will be forever grateful to them. By the way, I am not really planning on making a real game out of this, so somebody should remix this with an enemy to fight or something.