Also known as: Drop Rock Hora Hora (JP)
Publishers: Data East (JP),
Released in JP: March 30, 1990
Released in US: 1990
Released in EU: August 3, 2007 (Wii Virtual Console)
Released in AU: August 17, 2007 (Wii Virtual Console)
This game has a hidden sound test.
This game has a hidden level select.
At the title screen, hold II and press Start.
At the title screen, press Select 16 times. Start the game, and when the name of the first stage appears, press Select to choose a different one.