I enjoyed this a lot! I think you could expand this into a full release with some minor changes to mechanics. It was hard for me to tell that the shop was a shop, I thought it was like a loot room. It also would make more sense to me if I killed the enemy prior to their turn as they would get hit by me with 1 hp, then move to a tile, then die. I did run into the freeze as well.
Good job!