Competent! The hints and puzzles were clear, and I didn't run into any glitches.
The music is not great. It's not the worst thing I've heard, but it's a bit tinny and arrhythmic.
When I got to the invisible maze, I opened paint.net to sketch a tile-based map. I have to say, the solution is such a good troll.
Good work! Congratulations on the submission!