Big fan of the general idea and space allowing the propeller to play a dual function is very smart. Also a fan of the relaxed vibe the game has. The main feedback that I have is that the propeller is really hard to control, and seems quite unresponsive. I think ways to potentially fix this include: (1) not letting me leave the area of the propeller if I have the mouse key held down, which is very helpful when I have to spin fast or adjust the speed of my spin and (2) having some kind of visual aid to see when the propeller is active, since I think that the weakest parts of the game are the platforming.
Generally quite fun though!