Here's the basics: In each of The X-Spot's 25 puzzles, find the X as quickly as you can and click on it. Sometimes the X will be staring you in the face, other times it will need forcing into view.

Some of the locations of the X are quite clever, including a couple of puzzles which want you to fail purposely to achieve a cross rather than a tick. It's incredibly silly at times but all in all a charming experience. Plus there is score submission at the end for all of you with something to prove.

Newgrounds marks the spot.