I wonder why the music in that video starts sounding a bit funky at 4:40. There's a few extra instruments that aren't normally there.
I thought it sounded different too. I guess I need check whether it's the game settings or if my version of the music has been changed in some way. The train at the end is also supposed to move, but seems to not trigger for some reason so I had to ghost the end (maybe a 227 issue?).
While pretty much all the side-areas here are completely forgettable (the one that opens to the air for an ambush is a pretty cool idea though) I like the way the layout is based around the curved central room, which helps give it some structure despite the primitive visuals. There's not too much else of note beyond the texture inconsistency, although I guess the ending ride could be cool if it worked (but I won't blame the level until I'm sure it's not a 227 issue, and I recall it working before). Also light greenings EVERYWHERE.