I spent years trying to beat this game on original hardware. Mastered the first 3 levels, bosses were piss easy. level 4 has the hardest boss fight and the last level is bullshit. Had to use save states to beat the last boss who is a hilariously well animated rhino man and managed to find a way to cheese him. It's weird this game is considered one of the classics of the mega drive when it's really mid as hell and doesn't represent the console well.