I took a bit of a detour and added some background animation, along with an easy first level to demonstrate the concept. I also knocked Bob’s teeth out, as my wife didn’t like them. Poor Bob.

I still need to actually make Bob drown, but that should be pretty straightforward now I have the level set up. The sky above the water actually has collision detection on it, so all I need to do is start a timer when Bob stops colliding with that area and freeze or reset it if he comes back to the surface. He also needs to go purple over time.