It's an interesting idea because not only do the character's abilites change but also the environment whenever a "time switch" occurs. Since the challenge is focused on getting to the coins fast enough so you can switch to the correct "time state" (with light puzzle elements here and there), you could add a button that would let the player speed up the time flow, as i think it could avoid a lot of waiting without influencing the game/level design much. Overall, out of the "different abilities" games in this jam I've played so far, I would say this was the best one. Good job!