Hey !
First, I liked the idea of the throwable flame head as a projectile, but also as your -almost- only light source. Unfortunately, I ran into some bugs that'd get me into a softlock situation. :(
For example, my head would fall on the ground and just be stuck right there. If in a bad place, I really couldn't get it back.
I also had the head stuck into the ground, with no hope of getting it back. That's too bad, since I would have loved seeing more of the game. But globally, good job ! That's pretty nice for one week !