Please touch the Parts on the Stage according to the "laws". There are hints in the Stage. example Weight: Heavy or light order. Length: Long or short order. The Stage without the law please touch the Parts by flash order. On the Stage, there is also "dummy Parts" which is unrelated to a law. If you don't touch the Part within 10 seconds, you will be 1 mistake. When you make the 3 mistakes, game is over.