There are a couple issues here and there- a chest unreachable due to tree placement, overlooked sprite glitches on chests when they open, a shopkeeper meant to be unable to sell to, yet in a secondary shop menu dedicated to player upgrades can be sold to.

But, this also represents a lot of what I'd like from a browser-based grind-a-thon: simple but memorable environments and enemy rosters that increase in difficulty over time, the ability to apply knowledge to optimized grinding, a simple way to steadily upgrade your abilities, and tangible rewards for exploration. Solid.