Hey cool graphic style! I love the music. It was a bit weird at the beginning to deal with controls but I got it. I would highly recommend to continue working on with next parts and some polish of the game. Nice concept with turning into shadow, maybe you could figure out some more interesting mechanincs? Bests!
Thank you for your nice feedback! The music was actually royalty-free, but I was scrolling for a while to find something fitting for the game.
Regarding the controls, there definitely will be an option to change key bindings, right now I kept it as I'm used to playing platformers, but honestly, the default should be WASD/arrow keys and zxc, not jkl.
The long-term goal is to make a more clear split between puzzling in light form and platforming in the shade form, and add a lot more story. There probably will be moving boxes, levers, mirrors reflecting rays of light (and preventing the shade from crossing?), there are a bunch of ideas we're eager to put out.