Absolutely phenomenal game!
The art style is amazing, the gameplay is really unique and interesting. I love how you evolved what is originally a simple mechanic to eventually add some novel complexity to the later puzzles, the last one on the tower was awesome, and I realized I could use my own "trail" as a reference point on the second half of that puzzle which was also kinda cool!
My only feedback would be that the tutorial might almost be too "minimalist" I struggled for a good while trying to recreate the shape next to the first door. After that though, it was awesome!