Very original concept and use of the limitation, I enjoyed it! I really liked the soul shop, although I wish it had been explained in the rules section because I didn't even know about it until I had already let 11 souls escape, but it seemed well balanced. I think sometimes the souls appear a little too close to the edge of the screen, and they can be hard to see. I like the mechanic of switching colors, but I almost feel like the colors should be bound to keys to change because getting from one color to another quickly can be impossible at times with how the souls are scattered. I had a big problem with the music though, I think there was some kind of bug because I heard 2 audio tracks playing at the same time and they were colliding and it sounded awful, I had to mute it after a minute. Clearly this was not intentional so I hope you find out how to fix it as the music did sound nice before that happened. Some sound effects for when the souls appear and get sucked in would be the icing on the cake too!