If you can, you should try to add arrow keys support for non qwerty keyboards ;)

I agree with Sygmei. 
By the way, the growl can be bite us too easily., I consider that maybe could be interesting put more growls, that can be beaten more easily at the begin. 

Good job!

Nice game !

Never used blocking as it was disadvantageous :p

There is a line of pixels under the feet of the player, is thing normal by the way ?