Pretty fun and juicy! I kept picturing it as a survivor like and wanted upgrades and new weapons periodically. Could see it going somewhere!

I saw in your game page you were looking for suggestions, I would probably start by adding some challenge (make some enemies dangerous so the player needs to avoid them or their projectiles). Looks like for now you are relying on a score to hook players, maybe a full-fledged online leaderboard is too much but you can give some reference scores, maybe from the devs, so the player know how well they did or how much they can improve.

I have the impression that this isn’t the final state, but it’s still a great start :)