I really enjoyed the game, it makes me want to keep playing, and I see a lot of potential in it.
It would be interesting to add a screen shake effect when taking damage, so there’s a clearer visual feedback for it. As for the first enemy that shoots in all directions, it might be nice if it had different colors from the bullets it fires, so it’s easier to focus on where it is and what’s going on.
Good luck with the project!