Not bad for a first game. I like the graphics, and the sound isn't that bad, but the gameplay definitely needs some more work - There's too many enemies spawning to easily dodge around them, and there's only one enemy type so if you survive there's not much to do afterwards. Someone else also mentioned you should round the score down to 1-2 decimals, plus there's the bug where no enemies spawn after respawning.
Overall, still decently fun, if it were polished I can see this being really fun.