Just think of it as "Words... all by yourself." Race the clock and increasingly challenging level designs as you build a bridge of words. Anyone can think of a six letter word beginning with R when they have all day, but can you do it when time is running out?
If you can reach the exit points, youll get to test yourself again and again on boards that are most definitely not just square. Learn to fit words into tight quarters, or stretch toward that tantalizing exit, and do it fast. The longer you survive, the more difficult the boards become.
Challenge yourself, and the next time youre playing against Friends, youll shock them with your word-generating speed.