The towers are constructed of gems which may vary in size and shape. Your goal is to break all green gems and to save as many red gems as possible. Removing a red gem and gems that go off the platform will subtract one "life". See if you can get three stars on each level. Gem Towers is a physics based game that simulates collisions and gravity. You have 3 lives at the beginning of each level. Gem Towers is easy to play but hard to master.