I can't imagine how hard and annoying it was to implement 3D collisions. Just wondering, is the submarine that the player control a sphere, a cube or a point? Or neither of those? Anyway, its one of the most original way to interpret the waterworld theme. No need for music to create this oppressive ambiance. The only thing I would change was the controls, as the lack of up/down keys was a bit disturbing for a 3d game. Well played guys