That looks pretty good so far, I would keep an eye on it for when it comes fully.
Althought I really don't like this camera. You need to be way too near the edge of the screen for it to follow you, so I got a lot of cheap deaths from stuff I couldn't see coming, so if you're still working on the game I suggest you to give it another look.
I'm also hoping this demo is taken from the middle of the game instead of the beggining, because this is pretty punitive for a first level. (remenber, "challenging" doesn't need to be equal "unfair". Althought if you change the camera I think it will already make things way more fair)