Fun game! I thought the opening cinematic was very good, and overall the art style was very cute. The character and enemy designs were quite inspired, and I was always looking forward to seeing what the next enemy was going to look like.
Gameplay wise, I thought it was very solid. It would have been nice to be able to hold down the shoot button instead of having to press it down so often. I also think that the cherubs should shoot a little slower or shoot in bursts, since once they got started shooting for a bit, if I wasn't already in line with them it was a bit difficult to find the right timing to be able to fire at them. It helped seeing what my hitbox was when going over a projectile, but I wasn't sure if it was only for projectiles, since I think I took damage on my character sprite when I ran into an enemy.
Also I had a bug when I restarted after dying. Whenever I got hit, I wouldn't take any damage, but it would still play the hurt sound effect. (Died to the first seraphim in wave 3 if that helps)