I really like your game and the idea of it. I fill like if you will want to make something more from this game, you should try to make a VR game based on this, and maybe sell it, because the idea is super fun, and the theme is represented really good.
For the VR idea, you could add like a small shop, coins, maybe more shields which will give you more live while you play and maybe some levels, idk but you game is really fun.
(My highest score was 34 :))