Very fun idea and very promising for a potential full game, but gets repetitive after a while having to fight the same enemies in the same room over and over.
There isn't much to the gameplay, and I've felt the visuals/audio could use a lot of improvement; Mainly, I feel like it'd be a huge improvement if everything used a tilted top-down perspective similar to Undertale/Deltarune's, instead of just a completely top-down arial view. I've also found the sound of the bullets really sharp and a bit ear-piercing for me, at least when using speakers.
I do really like the idea of this entity sacrificing your limbs and watching you fight for your life for entertainment though, if there was a story rating of sorts on Itch.io I think this game would score high.