I like that the flashlight is limited by not only the battery but also by the sections where you need to stand on the solid shadows. It's well balanced. Good use of checkpoints too; you're never sent back too far for falling. The lighting effect on the ghosts is a nice touch, as well.
Having an animation for holding onto walls would have been nice. Also, there were a couple of times where I got stuck in the solid shadows when I turned off the flashlight.