Good game, but for me its really hard haha. I didn't manage to complete level 1, since the asteroids were just absolutely destroying me. The music is relaxing and its good to see some audio effects. Since you asked for honest feedback in the credits I will give you my opinion on what id personally change:
- Graphics: The particles look good, but the sprites don't really follow a uniform artstyle, seeing that some elements are pixel art and some aren't. Also some pixelart looks blurry, which I can already pinpoint to the unity import settings (for pixelart you want point filter and compression none). For the UI design, id use a simpler font and some visual/audio feedback when hovering/clicking.
- Gameplay: The game is quite simple, but still fun. The concept with the 3 bars is quite cool and adds some variety. In the asteroid section, id probably make them more static or only very slightly moving, because else its just really hard to avoid them.
Hope thats helpful! Seeing that this is the first game on your profile, id say thats really good for your first game