It's a code for loading custom made levels. It's long because it tells the game where to put each color and type of tile. If you made a really simple one, it would be shorter.
The game doesn't work for me. Might just be my internet, but it either stays blue screend or just shows 'High Score' and 'Play' but nothing happens when I press play. This is like, my favorite game evar too.
Okay, to the real comment. It works fine for me you guys, it's good for an animation course but you should make the mines kill on contact and remove the little time bar.