Nice pixel art and the screen wrapping projectiles are an interesting twist.
The crosshair is currently barely readable with how small it is and being the color that blends into the level.
Being able to shoot by clicking would be nice.
I think a bit more spatious areas would pair better with the design of the projectiles.
What will bounce the bullet and what won’t could be a bit clearer in terms of coloring.
Having a finite number of projectiles that you need to get back didn’t seem to matter much as there was always enough coming back before running out even if spamming mindlessly. It might be interesting to accentuate this design more, having more damage but less bullets at your disposal could support this idea better I think.
Overall a solid entry!