the path to glory

Hi /prog/, I'm working on a basic game engine implemented entirely in BBCODE.  I've got a pong proof of concept working okay, but the horizontal movement is pretty clunky, and I think the EXPERT MULTLINE trick would improve it.  Here's your change to divulge your secret in the interest of ^{SCIENCESCIENCESCIENCESCIENCESCIENCE}.  Help a bored dude out?

OMG THE SOURCE CODE HAS BEEN LEAKED
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_{References:
http://dis.4chan.org/read/prog/1187001373}