Each level is a puzzle to be solved by changing your color as youre perpetually on the move and growing larger. Eat and combine different colored dots of food until you match the gem you want to collect. Tap the controls to change your direction and dont run into the maze of walls or into your own tail as it begins to fill the screen as you try to discover how to solve the level. Some levels have many different ways of solving them and others have only one. Levels grow increasingly complex and challenging throughout.