I just remembered a small, quick project I made with a friend a while back for a school competition. It's called 'The Leak' and it's basically a puzzle game with simple 'liquid physics', made possible with @Animmaniac 's great Alpha Threshold shader.
I did the programming, he did the art. Pretty good for his first ever digital art ;)
I thought I'd post it to share the capx since I was pretty happy with how the paint aspect played out. Due to my inability to find a good color mixing algorithm however, the mixing method is pretty pathetic ;)
Play it online here (Best played fullscreen) (requires WebGL)
Capx here (Requires Alpha Threshold shader) (UNCOMMENTED AND UGLY)