I’m impressed by how much you managed to fit into this game!
The puzzle pacing could have used some work, I feel like there were a few redundant puzzles that didn’t add much to the experience since you already knew what the solution would be because you knew the mechanics. I stopped playing a bit after the second layer was introduced but that’s just because I’ve played with my share of LEGO gears already xD
Amazing entry overall though, you can be proud:D
If you’re interested in puzzle design, I highly recommend this lecture series: