One or two players cooperatively destroy bouncing balls with a variety of weapons. The players may only fire up, but may move right and left, or up and down ladders. The large balls that have been shot split in two, creating smaller balls.
Main CPU : Zilog Z80 (@ 8 Mhz)
Sound Chips : OKI6295 (@ 7.5 Khz), YM2413 (@ 4 Mhz)