Very interesting concept! I love the idea of beating up fellow customers to purchase more items! I just think less emphasis should have been placed on the collecting side of the game and more on the fighting side. The keybinds are kind of unintuitive (I wouldn't have found them were it not for the game page). Also, it would have been nice to have more than one attack (although, having spent the vast majority of the time on my game adding too many attack types, I can appreciate that it would be a pain to implement). And without the enemy fighting back at all, the game was a pushover.
Still though, great game!