The movement controls were on the wrong axis, i don't know if it was intentional or not (A/D was Back/Foward, W/S was Right/Left) but it really made the game difficult to play. I also did figure out how to pick up a gear, drop it, and even place it on the peg. I really feel there should have been instructions for that along with the movement controls on the banner at the start.
Definitely could be interesting if fleshed out more though, I do enjoy a good puzzle game!