As far as I played, the enemy monsters seemed too slow to be of any danger to me.
I also seem to have snowballed much faster than the enemies, so I think the pacing could use some work. I opened a new tab to rate and comment on this and it seems none of the monsters have reached me. I haven't collected souls or even moved in minutes, and they still haven't been able to make it through my summons.
But, seeing as it's essentially a Vampire Survivors or Brotato abstract (I'd argue closer to Brotato with the enclosed space), there's definitely ways to make this work. I've seen a couple video essays on the psychology of Vampire Survivors and what makes it fun, so that could be something to look at for ways to improve upon this.