I really love the color-changing mechanic; it reminded me of Runbow, but gives the player more agency, which is good! Honestly everything here was executed incredibly well. The visuals nail the dingy slot-arcade aesthetic (peak screen-line shader), the levels are well-designed with multiple paths to complete, the movement feels tight and not overly punishing, the bonus levels were a great evolution of the main game loop. It doesn't feel like there's any coyote time in the jumping, so maybe add that if you plan to continue working on this. But I finished the main levels and the bonus levels, so otherwise I just wish it was longer! (Obviously not expecting that for a jam game, I just had fun playing it!)