So, I’m really big on the whole idea of ‘ancient living stone’ creatures/monsters (especially after spending the past week reliving memories in Shadow of the Colossus), so I was keen on the theme being ruins. With my hopes dashed, I was going to do a lame ol’ Aztec underground maze, but suddenly recalled some moments in my gaming history that chilled my spine, involving unseen creatures that lurked beneath the sand, and would snatch you up if you tread on the sand.

SO; don’t stand on the sand. You are safe on the rocks. It will come for you if you leave the rocks.

(It’s actually uses a really simple physics-based movement system, to give some nice arching effects when surfacing/diving)