As a beginner gamedev myself, this is a pretty good game! And I got some feed back for it
I think that you should make enemy collisions a bit smaller, since sometimes it feels unfair. Remember, you wanna make the players feel good when playing your game.
Try to make some health system so the player can take more than one hit.
Also, the Menu UI is not centered in my device, this is a bit annoying, but I have seen bigger games with similar problems, so its not a big deal
The music can become a bit annoying too, since the melody is too short and has no variation.
The gameplay and controls feels good. A bit slow IMO, but it does not feel bad at all.