That was fun! At first, I was under the impression the spook meter was going down too quickly, but after I played around with the items, I understood the loop pretty fast.
The art's cool and tells clearly what each thing is. It's endearing, in a way.
The sound effects are fitting and I really liked the music! The house one reminds me of music you'd hear in the 80s. The cave ambiance is also super good, really nails down the creepy and sinister factor!
Only thing I'd point out is that maybe it'd be nice to show the dad's health bar on the top of the screen at all times, considering that it's a game over condition and all. Though maybe the intention is to make the player visit their pa once in a while, which never hurts to do, ey?
The potion system was also key to being able to finish the game, so it's good that it was able to have relevancy! Sometimes, we can implement systems that end up not having as much of a spotlight, so it's good that you guys were able to avoid that.
This was really good and worked well. I had a lot fun seeing the numbers go up and emptying the shop. Good work, and keep making stuff!