This is a neat idea, and the execution (especially the pixel art and the spooky sounds) is really good.
I would say that from a gameplay POV once I finally made a mistake on round 12 I wasn't in a rush to dive back in just because of how slow it is. I would love to see a version that gets faster and faster the first few rounds, to a point where it feels fairly breezy to fail and try again, and has a more arcadey vibe to match the really cool art.