I enjoy it a lot! I think that the battle system needs more work (like more variety in weapons,enemies attack, ships, etc. to not feel repetitive so soon) but for a gamejam is pretty good! Furthermore, I don't know if its intentional but you can hold left click and start shooting like a machine gun, I found it interesting XD.
Great work! If you continue to work on this after the jam it will be a very fun game!