This was really good! I enjoyed pretty much everything about this entry and it had a very old school vibe. It really encouraged exploration, though having to restart from the beginning is a bit daunting if you die later on in the game (like I did once in that room with the two buttons that open up a lot of side doors). The room with a spinner had me puzzled for a bit until I realized what was going on. I think there is a sound effect for when you step on it, but it's a bit too quiet, could use with some volume up.
Very well done!.