Impressively polished for a jam! I found the style of the game to be quite charming, gave me Pikuniku vibes. The mechanic I think would be well suited for a that sort of puzzle-platformer rpg genre. My only complaint was the way you select things to swap felt a bit weird when there were a lot of objects near each other, like the screen with the 3 teeter-totters, I had a hard time selecting the object I wanted. One idea I have in this instance would be pressing the swap button lets you select any of the objects on the screen, perhaps with the crank to cycle through and then pressing again locks you to that object. I'm not sure if that would feel good or not, but it's one possible way to decouple your proximity to the object with your ability to select it. 

Really nice submission!

I had a lot of fun with this game. Enough that I just had to get that last donut! To mirror other comments, being able to more easily swap between the characters on screen would be a massive quality of life improvement. I’d love to see this expanded to a full game. The physics works really nicely. Don’t suppose you want to open source this? 👀

I couldn't stop until I got the last donut - the game and the mechanics are really fun. I would love to see more levels and meet new characters you can swap with, in a more complete game!

The pre-made sound library definitely helped with the charm factor here. Was also surprised to see such a polish physics system for handling rounded shapes, momentum, and rotation effects. Did you have an existing engine for handling these interactions?

Swap being limited to the nearest entity is very intuitive for this demo but part of me wishes you could change targets anywhere and enable crazy chain reactions.  Adjustments to crank speed would go a long way towards reducing how repetitive the motion becomes since you're almost always using it.

Solid work all in all.

Great job on this! I got stuck on one tricky donut (I'm sure you know the one :P) but I managed to get them all. This is a perfect use for the crank. The swapping mechanic is simple but you came up with a bunch of different ways to use it.     
My only real criticism is that targeting a shape  is a bit finicky if you are close to 2 objects. My suggestion would be to let the player switch targets with a button, and to maybe show your targeting radius as a circle so it's easier to judge how close you need to be.