S.T.G.

Power-up items appear when some enemies are destroyed. There are 3 items: Power-up (red), missile (green), bomber (blue). Defeat the target enemy at end of the stage to clear the stage. When all stages are cleared or all lives and credits reach zero the game is over.

DaimonSoftware 1st Develop section.
http://daimonsoft.info/kuran_kuran/

Tuchikure
http://www.ds-tuchikure.com/

CONSUMERS STUDIO
http://www.consumers-studio.com/

S.T.G. uses OPTPiX SpriteStudio.
http://www.webtech.co.jp/spritestudio/