I didn't mention them as I didn't play them yet while I was writing, but the batch of levels in the fourth and fifth world so far are quite the challenge - there's one that is deceptive because of how there's only a yellow block moving, but figuring out how to get it to the place you need it to be for it to block a pit still eludes me...
Yeah, the game itself is pretty obscure and again, if it hadn't been for the NSO recent re-release, I wouldn't have remembered it anytime soon.
Thanks for reading and for your comment :]