Simple, but absolutely terrifying. The sound effects of the hands on the glass was PERFECT--had me jumping every time. Managing the camera storage space was a genius addition, especially since it required mousing over to the button and clicking delete for each photo--that slight time requirement created some good tension. I think to really polish this, it would be cool to show the photos on the camera as they're being deleted and have a short cutscene for the two types of failure/the victory. Would just make it that much more satisfying to reach the end (although it already is!)
Great work!