NOTE:: The eating heart function does work, you just have to line it up with the human bodies, it takes a little practice to get it right. I did this purposely because you're supposed to be eating the HEART, I didn't want the werewolf to be eating at any other part of the body, like the crotch for instance. And the energy reloads on its own, separate from the health or hearts.

EAT HEART WORKS BEST WHEN THE CLAWS (FRONT FEET?) ARE ONTOP OF THE BODY'S CHEST

UPDATE:
Since it seems that it was too hard, I added a timer for the health, so that it regenerates without having the eat hearts, although hearts give you a boost, and don't forget about the charge attack

This is my first flash game and I'm exceedingly happy with how it turned out.

It may take a little while to load, since there is music and such.

For those who skip the instructions, cause I know I do it too,

Move is left and right arrow
Up is jump
Down is eat heart
F - bite
D - Howl
S - Swipe
A - Decapitation

Space - Charge

Check the credits for the music

There are options to turn off the music in the settings, as well as to make the game a little brighter if it's too dark for your screen, although it's kind of crappy.