I want to be able to tell how many people have completed my game. One idea to do this is to play a sound file when the game ends and host that file somewhere and then see how many times it's been downloaded.

1. Is this a sensible idea?
2. Where could I host it so I can count downloads?

Thanks.

You could possibly provide a link at the end of a game to a web page and count how many times that page is visited. Seems kind of "bush" league, but it would work.