Nice work on making something pretty good that works on both the computer and on mobile !
I had several crashes while trying to play, but as I see from the other comments, you are already aware of that.
Other than that, the game is responsive and works well. It's not my favorite type of puzzle tho, I feel like I can't imagine the results in advance, so I end up just trying things until it works, so it's not super satisfying.
But I could see this being pretty fun for people that can do this kind of projection, it reminds me of playing chess in a sense.
Well done !