I am so glad I decided to try the download of this. Just a heads up, for me the web version is busted: it runs but the mouse doesn't clamp in the game so I basically could only turn a small bit without having to do some advanced mouse-fu to get my mouse back controlling the player.
But I decided to check out the downloaded version, which is not only playable but enjoyable! I think this is a good jam game that can be iterated on and get something special with more development time! I think some player upgrades like additional speed or reload time would be nice in addition to extra bullets.