Just wanna say great game, I loved the music and the art and the whole concept. Well done on the platforming too. I played for few minutes and was confused by the function of the lights at first. Then I found the shadows that get cast. The sound of the glimmer says it should cast a shadow, but for me it didn't.
so I had to find another way to beat the game without using shadow platforms. The way I did it was by jumping at the edge of each platform and repeatedly pressing the jump button to get the turbo jump. That's how I got to the end with both characters. Great work.
Edit: the shadows work well, I was just lazy to solve the puzzles.