Guwange is a vertically scrolling shooter arcade game. The game features intense gameplay with challenging enemy patterns and power-ups.  There are multiple versions, including a Master Version (released June 24, 1999) and a Special Version (released January 1, 2000), both released in Japan. More information regarding the developer and specific game mechanics would require further research.

Guwange (Japan, Master Ver. 99/06/24)

Gussun Oyoyo (Japan)