i loved this game as a kid but i never could complete it, even a couple of years back when i retried to conquer it on emulator i got two about the 4th world where the level chases you i think and couldnt do it!.
The game is great as is the music and the bonus games....well lets just say they are interesting.
good too see im not the only person who liked this game :D
The game uses an engine from a game called Magical Hat Flying Turbo Adventure basically with different graphics characters. Basically, they didn't have rights to publish that game outside Japan. Also, the original games looks lame and fairly generic and the resulting change to Decap Attack had much better graphics and music. You can see video footage of the Turbo Adventure on you tube.