Was pretty good, room for improvement
Overall the game was pretty good. It might have been nice to have a pre-game screen with maybe an overview explaining an objective, or what you need to do in order to progress. Could have also put the keys you need in order to move and fire your craft.
Its definitely good the way it is now, but it could be better. If you can, increase the hit boxes for the ships a bit, most of my shots went right over them without even registering.
Graphics were good as well. Keep it up.