The simplistic graphical style is super cute and charming, I really like that aspect. The shooting and movement feels good, though the enemy speed is just a bit high for your damage and movement speed. It was a little difficult to remember which color I would be rotating to, a more clear visual indicator of where you are in the color sequence would be helpful. When many squares spawned, they would start clumping together into one giant mass and it seemed to mess with the collision logic a little. The audio panning on the shots was fun, I liked that; however, the music loop was far too short and improperly trimmed so it was immediately grating and hampered my enjoyment of the experience a lot.
I think there is potential here for cozy little arcade shooter, but it needs some polish and more variability in gameplay. Good effort, I’m glad to have played and would give an updated build a chance in the future.