Good but not great
Its pretty good and a good concept but i found a bug -.- on level twelve i was left with two skelingtons that were invincible. i went on for like 5- 10 minutes but they wouldnt die. improvments:
-Different classes Archer, Warrior, different variants of these etc, theif, monk. each with their own special attacks weapons etc.
-More variation in enemies and maybe bosses?
- maybe a skill tree other than just item advancement?
These ideas would make it kickass so go for it