Very cute, I like the art style and the minimalism. I wish we could spend the gold on stuff!
Maybe things like:
- Weapons, for more damage or special effects. Special effects example could be freezing or burning ennemies.
- Potions? Consumable you could stock up on?
- Hats
- Decoration for the town :D
- buy New NPCs? Bodyguards? Or your own pet monsters (blue version of monster that help you)?
Throwing ideas out there.