Wonderful!
7 stars -only- because it does not feel like a complete game due to the length. It's otherwise 5/5!
Great artwork...fun, challenging puzzles, and a neat concept to wrap it all together. Everything fits together in a way that makes sense...you are simply accessing this machinery in the way they were designed to be...almost like a key per each piece. I really enjoy puzzle games that feel like they make logical sense, and are not just floating in a meaningless existence.
Well done, I really hope you fill this out and add a bunch more levels!