The point of this game is to reply to the person's post above you, entering only a single word, making sure that it has no relation to the word previously posted. Be reasonal about this, as nothing is TRULY random. Just make sure your word is not directly connected to the word above it.
Example...
Person 1: Clouds
Person 2: Worms
I'll start.
Pineapples.
Example...
Person 1: Clouds
Person 2: Worms
I'll start.
Pineapples.