Very solid entry. Really like the twin swapping concept and I think it fits great with the theme.
The coherent art style and music effectively create a fun & cute aesthetic that sets a distinct tone for the game. I'm especially fond of the pixel art animations and background art.
Character controller also feels really nice which is a deal breaker in a lot of jam-entry platformers. Movement and jumping is smooth and satisfying. A pleasure to play with.
My only minor critiques mirror those of previous comments, notably the font (which had me squinting) and the character-swap camera pan which isn't so pleasant on the bigger levels.
All-in-all a great entry!
Editing to add that the scarves are adorable and a wonderful secondary motion for the animations!