That's quite an impressive game with quite a lot of content, especially as you did it alone.
I like that the different ships and upgrades offer opportunities for emerging gameplay. For example, I tried the slow bulky ship thinking that it would be unbalanced as you get so many enemies around you but it turned out fine. I played completely differently as I was able to have enemies trail me, get shot and automatically have their loots collected.
Anyways, thanks for making that game!