Thanks for the feedback! I definitely want to improve the combat system in an upcoming update. The second shop-keeper was actually the boss and after beating it the game would've been done and a credits screen would appear. You should've been able to restart the game by pressing L. If that didn't work somehow then it was probably a bug :/
I thought about adding ambient music during development but I rushed the SFX. It will follow in an update as well. Still, thank you for playing!