The app consists of two parts. 1.Play the prebuilt game which includes 10 levels. Each level includes 5 courses and increases in difficulty. 2. Build and play your own games. It`s a simple but fun game. Steer the raft to the safe harbour. Avoid mines and killer fishes! Steer The Raft by tilting your device in any direction. Use the optionsmenu to get help and to build your own games. Please let me know through E-mail if there is any problem.