That's just a openSCAD package to make your own design for this 8-bit videogame coasters http://www.thingiverse.com/thing:115150.
Came with a few examples.
If you couldn't find the character you like, just design it.
TODO: I'm having troubles with pictures who have holes on them. I'll try to fix it.
At file "8-bit-customizer.scad", you will find a 16x16 matrix called "dibujo", just think on the numbers as pixels.
1 is pixel on.
0 is pixel off.
Added: 2 is for put a pixel at medium height.
Just google for the 8-bit draw you want and try to reproduce it!