Very fun and addicting adaptation of the Vampire Survivor format. I agree with the other commenters that some extra juice and impact would add a lot to the game's feel. I will say that I wish the options were a bit more balanced. I played a few times and reducing cooldown is far and away the best option (so good that if I went too long I was untouchable until the sheer number of projectiles crashed the game). And the speed of the projectiles never seemed very useful.
All that to say, it was still a good addicting gameplay loop and there's a lot of room to expand with different enemy types and options to upgrade your little circle.