This is a good base to work from. The movement and attacking feel good so far. There are a few things I didn't see mentioned here, so I'll bring them up (am running the linux version).
1. I didn't find any 'abilities' to buy in town.
2. I don't understand what the artifacts do - they get listed onscreen when I enter dungeon, change floor but I can't see them in the inventory any more after that. I also can't equip them manually in town.
3. Melee enemies (not the boss, but skeleton and zombie) cannot seem to damage me, even if I bump them over and over or stand still.
4. I found quest givers, but quest button does nothing.
5. Settings button does nothing. Not sure how to see character stats, for example.
6. Partial controller support. Can move with analog, but nothing else.
Best of luck with the project, and thank you for providing 'nix build!