i purchased the game by under my games it won't download for some reason. i keep qlicking on the picture of the game annd nothing happens...

You click the game, then select the Download button. If you've selected to use the GoG.com downloader, the program must exist on your computer.

If nothing happens, then Javascript is not enabled in your browser: instructions on how to do so can be found here: http://www.enable-javascript.com or you can simply turn off the GoG.com Downloader and download the normal way through the browser.