I can see why the score is low. This had little going for it. I mean, I didn't know how to play. I pressed the button to stab, but I couldn't seem to damage him. The layout was too simplistic as well. I am still glad you can improve.
You needed to have a much better use of sprites. It was just too generic. At least it managed to make the collection. Do all submissions make the collection? I couldn't even recognize Pico.