Very visually immersive. Sound design and controls are done well as well. My only real gripe is that the solutions to the puzzles are very arbitrary. This can make the game frustrating to play. Personally, I needed to look up a walkthrough. A hint system would be good.

Mainly, for future puzzle games, solutions to puzzles need to follow a logical thought pattern. Do not confuse round about solutions with a well made puzzle. I understand you wanted to make a difficult puzzle game, but there is a fine line between difficult and plain old impossible. Overall, a decent start, but changes to the puzzle systems need to be done for future puzzle games you make.

Also, including some type of library for holding screenshots would be very helpful.