i'll play a game...

I'll play a game and you're invited
Though this may not really get you too excited
You may opt not to play
You'd still be involved anyway...

The game is called "Make your own ghost"
Everyone's free to run and get lost
You just have to be cool
Follow each and every rule...

First, I make the rules
Then I'll give you clues
I won't tell you what to do
Just note the things that you cannot do...

I can play fair and square
I can also make you beware
There's nothing else you have to prove
For I'll be watching your every move...

Ready or not we will begin
See me as I come in...