the game is cool!! it's well made and all but I have some comments:
> the jumping on the walls mechanic doesn't work properly, in fact it confuses me 'cause when there's a thin plataform it gets in the way and I cannot jump further, and when it's a big wall sometimes it works and sometimes just doesnt happen
> there should be a place where the controls are shown, I had to test before knowing, but the scenary things are a good idea
> I miss a dead/game over screen

Looks promising but is there a reason the left mouse button is used to attack since there is no mouse aiming?
WASD + K jump, J attack would be fine.
And for the lefties out there, arrow keys + X Jump Z Attack

Nice artwork! Collision detection needs some work as I often get stuck on corners of terrian. Controls are a bit floaty. Had fun!