Charlie Sykes seems baffled by this flash game... but its really just a mathematical trick.  The game asks you to pick any two digit number... I chose 69 (heh heh).  You are then supposed to add the two digits together (for me its 15), and then subtract that from the original.  In this case the result is 54. The game then shows you a table of numbers with an image over each number.  You're supposed to stare at the image that corresponds to your number for 10 seconds, and then it magically shows you your image!  Here's how it works.

Your two digit number can be represented as 10x + y (x represents the 10's digit and y represents the singles digit).  The addition of the two digits can be represented as x + y.  Subtracting the two is then represented as 10x + y - x - y which is equal to 9x.  That means that no matter what number you choose, the resulting number will always be a multiple of 9.  If you look at the table of images (an example is below), you will see that every multiple of 9 (9, 18, 27...) has the exact same image.

And that's how its done.  Tricky huh?