To start out with the rougher side of my experience, I did manage to brick the inventory in this game and I feel like it took me a second to really grasp how the inventory worked. I also feel like supporting Mouse3 or Mouse4 as an alternative to Mouse2 would be nice since my scroll wheel is less than responsive. In terms of improvements, I think an enemy that walks on the ground would be a nice addition as they would consistently be in range of your melee driven attacks.
With that out of the way– wow! I love the visuals, the use of music, the combat feel, everything about this is slick and polished. If you track down the inventory bug and add a little flavor in terms of menus or progression I think you have a solid and commercially viable arcade game on your hands. Congrats on the submission!