The intro line that's narrated gave me a chuckle :P
The art looks pretty good! I like all the different animations you created for the main skeleton and the npcs. It took me a really long time to figure out N would make me move faster at the cost of mana, also the stone piles that restore mana weren't obvious until I saw them used in the gameplay video (a bit more tutorialization might help). Also it's good to have sound effects for player actions like the attack action, but the high pitch yelp is a bit much after repeating a bunch of times. Something like a subtler grunt or swoosh sound might work better for an action that's repeated as much as attack. I liked how health and mana were tied together though, it forces speedier gameplay to be riskier which is good.