This game was a pretty relaxing entry!
The controls were pretty smooth and the graphics weren't half bad! Though, I feel like if you changed the colour of the background (it kinda looks like the default Unity skybox) and changed the font to something pixelly, the graphics could look even better than they already do.
I guess my biggest gripe has to do with sound, and feedback in general. The game felt a bit hollow and empty without any sound effects or music, and I didn't know if I was actually harming any enemies because when I fired at them, there wasn't any kind of feedback, like a flash or chiefly turning red.
Hitboxes were also a little weird, because each level ends with an arrow that points down, implying that's where you go, but I finished each level just a little bit outside. Hitboxes should be forgiving, but when you have an arrow pointing in a direction that you don't actually go in, that kinda throws me off a bit.
But yeah, enjoyed my time with this one! Good entry!