I loved how the music changed when you turned the lights off! And the scribbly, doodle-like art style was really neat! One of the things I might suggest is to make it a little more clear which platforms you can stand on! I know in one level I got stuck for a bit because I thought the large grey platform was just a background object! The collisions were also a little funky sometimes, like with the staircases where it was a bit difficult to tell when I was able to climb up them or not, but the platforming wasn't frustrating at all! Overall, great work!