Use JMonkeyEngine to design, create and test your own unique game. The game just have multiple interactive components, a user menu (or Heads-up display), use physics (e.g. gravity, friction) and include collision detection. Be sure to use textures, images and other supporting materials to make your scene and interaction realistic. The game should be simple and based on some design or concept that you want to create.
Ping me if you are interested.