I have an old ipod

I recently found my old ipod that is running on iOS 6.1.6 and I thought I could play an old game that used to be available before the change from 32-bit apps to 64-bit apps, but i was wrong, after i signed into the account i had originally bought the game i went to my purchased and was ready to play, but my purchased isnt loading at all. And so I was wondering if there is anything I can do to get a blast of nostalgia and play the game. Thanks!