Have a clickable image to open embedded content in wordpress - Space Invaders

[Farnell]

I would like to be able to click on an image on one of my blog pages and then have that start up some embedded content.Specifically, I would like to create a cover image for this Space Invaders game, found here: http://arcade.gameex.com/playgame/6135/space-invaders.htmlembed code =\[code\]<iframe src = "http://arcade.gameex.com/embed.php?id=6135" width="480" height="360" />\[/code\]I would like to click on my custom cover image in the page and then have the game start up, but I have no idea how to do this.I've used wordpress for a few years now, but only doing minor style tweaks... nothing like this.Any help for a beginner would be much appreciated! I am not an experienced programmer.-C