Knightmare-ish

Chess room: The white pawns should have moved on the f- and g- files for the puzzle to make sense, but in the game it's e- and f-. White king could escape check with a Ke2 move otherwise!

And a biggie: I think the game would be better without the swordfighting rooms. It's the weakest part of the game, and it's not really what Knightmare was about. It's characters, puzzles, spelling and treasures - which is where your game is strongest!

The camera changes in the long over-the-fire bridges are exceptionally cruel. Holding up to move forward and then the camera swings round so that same up direction now runs you straight off the side. Maybe just pull back the cam in line to show the scale?

I would recommend having something behind the doors - maybe just a glowing box to block the way? Currently it's very clear that you just run out of floor. In the fire room you can actually walk through too quickly and die, so that would help with that.

Those spiral staircases were torture! You should consider moving the trigger zone to near the bottom of them. Going up them isn't fun, and doesn't add anything positive.