Crystal Boy’s mission is to collect crystals. There are many traps in the sky. Be careful!Move Crystal Boy with the d-pad left and right to get crystals. If Crystal Boy hits traps or ravens, the game is over.If Crystal Boy gets a star, he becomes big for a limited time. Big Crystal Boy destroy traps, but ravens make him become small again.You can choose BGM with option menu. When you select BGM RESET, BGM is nothing.