Wow, that throws you right into the gameplay! I'm really glad it was click to shoot, space to jump, WASD to move, because I didn't see any controls on screen and all of a sudden I'm being attacked and I had to react!
I didn't make it vary far, and I didn't see my health when I played through just now. I know I "recovered 6" at at a campfire, but I couldn't tell in-game what my health looked like or if there was anything I could do about it.
If you continue tinkering with it, if I just overlooked a visual health indicator, it would be nice if maybe it was on the character and/or if the screen had that "closing in" effect some games have where something creeps into the center from the edges of the screen as you get hurt. It's just too fast-paced for me to stop to look to the edges of the HUD for information while I play.
I can tell you put a lot of work into it though - good job!