a couple of things ... im getting a lot of screen judder when moving - its not as smooth as other games ive played ? also if you kill the second big monster while its near the fire pit (after its dropped down from the platform above) then the key it spawns flies into the fire pit and you cant get to it !
finally i would make the spacebar the jump key then z could be the character change key - that would make it an easier layout for the left hand ...