The purpose of this game is for you to interact with the little guy on screen in whatever way you would like. When you interact with him, you gain money (you get more money for more extreme actions). You can then use this money to buy new weapons and other methods of interaction. You can also buy new skins (so your buddy looks different) or new game modes (like Low Gravity, for example). Your progress is continually saved, so bought items will not be lost when you close the game. The only way your progress will be reset is if you use the Clear File command in the file menu.