Jelly Tower is a physics game similar to World of Goo. You must build a tower with a limited number of balls to touch the checkpoints in each level. When a ball touches a checkpoint for a few seconds, it will become fixed to that point. Each ball that you use adds points to your score depending on its placement, so be as creative as you want. Be careful though, any section of your tower that is shown in red is under a lot of stress and could break with your next move.