I had a lot of fun with this. Choosing your equipment at the start and having to manage it in the dungeon is a great idea. And wow. The sprites look incredible. The whole game looks fantastic. The soundtrack is cool too.
It would be good to see the effects of those potions and rune-stones displayed somehow on screen, and the rng-balancing is a bit off. I wasn't hit once until the last fight, but then every time. It would also be nice to have the last weapon, that was selected, remembered in the menu. I needed to scroll to the last slot, whenever I wanted to use the weapon there.
Other than those points, this was great. I think you should definitely work on this after the game-jam.