My only real criticism about this game is the key sprite - it's way too unremarkable and easily overlooked, but aside from that, the levels still look great (in a very 2.5D way, of course

(Oh, and playing it with a port that allows defining music to play along the game helps even more - this was one deliberate change I made from RedNukem, which entirely disabled the music playing capabilities of the engine, aside from that [censored word] CD soundtrack the game was shipped with - that's something I can do without.

And yet, the game gets a lot of negativity. I don't get it. What's supposed to be so bad here?