I think it's really cool that the developers were able to piece together this collection of archival work and what work had already been done and finish making the game. Unfortunately, I can absolutely see why it was canned at the time. It's fine, I guess, but some of the sequences feel like total BS (those rolling enemies when you're going uphill on the rainbow, the crab boss, the tedious nature of the final boss if you can't guess the right direction to throw the bombs to get some extra hits in), and sometimes the collision system has you getting hit when you could SWEAR you were landing on an enemy, not bumping into them from the side. If it goes on steep discount again, it might be worth picking up, but I don't think I'll be revisiting it any time soon.
Played in single player mode.