Not sure what you mean by "camera bounds not set" but I tried to fix the display area being 3 times the height of the play area by hacking into the google chrome script and couldn't figure out how to do it for this one. The game does seem to try and start at 0,0 and yet it starts somewhere near the middle, with the play area apparently set correctly. Never had this problem with another game, so it was something the game induced.
Switching to full screen didn't fix the fact that my avatar was just a black void. I suspect that you applied the mask after the image. Mask should be applied first to remove the background where your avatar is, then apply the avatar in the void generated. Also I suggest that you make the mask the same as the avatar's animation to eliminate black space behind the avatar.
I was able to move sometimes with the arrow keys, but often not if trying to move up or down. (Web page tended to scroll instead.) Attacking mobs was sometimes possible and sometimes not, with no clear indication of why or why not?
It has been a while since you uploaded, so hopefully you get back to fix some of this and move it into true beta testing. (Currently it is like an early alpha that has been made overly accessible.)