Really solid base to this game, overall very polished, a lot to be proud of with this one! I am "Frog" on the leaderboard :)
For constructive feedback, at least personally I didn't think the core mechanic was fun in it's current state. It just didn't feel fun to be killed by invisible enemies that you couldn't shoot back at. I also didn't like the limited capacity on the laser gun, that didn't add to the experience for me. I think there's really good bones to this game, with just a few gameplay tweaks it could really be killer. I'm not sure how exactly to fix those problems, but I may be alone in thinking their problems so take this all with a grain of salt anyways.
Really glad I played, thanks for posting this :) If you could review back it'd be much appreciated.