Funny ...
Make the camera/player rotation a bit slower, it'll be easier to aim.
One thing more: That's NOT how you through a javalin ... you always have the point pointing forwards. If you want to hit something infront of you, you rotate to your right (for right handed ppl), strech out your right arm in the direction opposite to your target, and turn your head towards the target. The hand is open to the sky, and the javalin lies between your index finger and the middle finger, pointing towards the target and up. Then you rotate the arm at your shoulder, leaving it stretched out all the time. KInda hard to explain...
But that's how I learned it in school

It's a fun idea though, and with some tweaking it'll be great fun to play!
You might want to change the skin on the model a bit. I mean: she's wearing pretty much no clothes, so you probably want her to be "good looking"... ... her ribs don't look that great, they make her look like she's anorexic

Poor animals^^... I like them, they look cool. Don't kill them ...