I recorded demo using AD and only later realized it wont be playable without the mod. But if you want blind run:
Progression was clean. Though in final room I didn't notice environment changing while fighting and didn't realize that place was level exit.
Give player some time to check the room before fight starts or delay exit opening if you want them to notice a change.
If a door requires a key to open it is better to add some kind of markers/hints with corresponding textures.
I would suggest to avoid paper-thin walls/floor unless it's absolutely necessary.
Overall it was fun. I can see you are trying some crazy ideas there. Keep it up.
Oh, and you might want to check
- tells how to release a map.