Every once a year a fair gets set up on our town square and I've seen these quite often when walking past. I've never actually used them myself, but I've seen lots of other kids do it. The visuals are really nice, and I love the VA!
I also only noticed the gold chests after my second try, and got a score of 303 after a few more, I'm probably not going to get any higher than that.
I really enjoyed playing this, nice game :D