Really cool mechanic! I like how you give the player so much control over the level, there's lots of rooms for secrets and such depending on how you turn the gears! In the future, I think it would be nice to have zoom feature, where you could zoom out the camera and see more of the level. There were times when I wanted to look more above and in front of me, but the camera was restricting so I couldn't get a grasp on where I was in the level.
In level 1, there was quite a lot of platforming and different mechanics like rotating platforms and spikes? I think you could introduce these mechanics more gradually, and putting a lot more emphasis on your core mechanic (spinning the gears). Overall, I think you could use the spinning gears mechanic more often in the levels since I would say it's the most interesting mechanic here!
Otherwise, you have a lot of good stuff here! The art looks really good and the movement feels pretty nice. Great job!