Quarth

Quarth (クォース, Kwōsu) is a hybrid puzzle game/shoot 'em up developed by Konami which was released in 1989 as an arcade game, sold as Block Hole outside Japan. Besides the arcade version, there were also ports of the game to the MSX2 (with a built-in SCC chip), Famicom, and Game Boy—home releases used the Quarth name worldwide (with the exception of the Game Boy Color release in Europe of Konami GB Collection Vol. 2, where the game was renamed to the generic title Block Game for unknown reasons).