I thoroughly enjoyed the puzzles and the different mechanics. I finished the game in about 10-15 minutes. Very clever and well designed. I think that a low hum or some kind of audio feedback for the lasers would be a good bit of polish. I also really liked the lasers that worked when not a certain number but didn't realize that at first, perhaps using a different color for those lasers might have made that a bit more obvious? I hope you continue to expand the game and add more levels, they are very good. The pacing was such that each time a new mechanic was added, it didn't feel overwhelming, but focused on the new thing and I was able to figure it out with trial and error. I'm sure you probably already thought of this too but maybe you could add a level selection screen for the final version?