It's a good little puzzler with the traditional approach of character swapping. With the level already changing at random time and making the control funky because it doesn't follow the angle of the camera, I felt that not being able to swap character at will was a tad to much. I know we want to respect the theme as much as possible in a jam, but not at the expanse of fun.
As for the rest, I like the art style, the music fit without being annoying, the overall puzzle and mechanic are good. Overall, you have a good game :)