Tumbledrop is basically a game of physics. On entering a level, you’re presented with a variety of different shapes in formation. Somewhere in the formation will be a pink star. Your aim is to remove pieces from the screen by tapping them. This must result in the pink star landing safely on the island or platform in the level. If you don’t succeed, your star will plunge into icy waters with a distressed look on its face. Sounds simple, right? Well at first it isâ€¦ but naturally it gets much harder.