You know, when I was thinking about different ways to interpret "reversing roles", having characters swap roles midgame did come to mind. I'm glad to see someone explore this idea with such success. The game was both mechanically and visually easy to understand and enjoyable. The music felt repetitive after awhile, but was also really good. I particularly enjoyed how the game made use of swapping back and forth for verticality. I felt clever doing things like giving the platforms hops so they would be underneath me when I swapped to what I needed. The way the game pauses when swapping gives me the same feeling of doing something cool when I use bullet time in Tears of the Kingdom.
My hand did cramp a bit while playing it. Probably because I was trying to do everything with just the one hand (WASD, X, and Z are all keys I'd use my left hand for). But once I was using my right hand for swapping and abilities via J and Spacebar, I was a lot more comfortable and had an easier time controlling my character. In hindsight, I imagine that might have been the intended control scheme from the get go. Oops.
This is a well-rounded entry that knows what it wanted to do and executes on it. Congrats to the team for what they've managed to accomplish here.