Based on a game my friends and I play, here’s the Reverse Game ($1). Load in a folder of songs you want to use, and when everybody’s ready, hit “GO!” The song gets played backwards – challenge your friends to name the song and/or the artist before the song ends (at which point it plays it normally, so you can hear what you missed).
And just in case that’s not hard or fun enough for you, instead of playing it in reverse, you can also choose to play it 4x faster or 4x slower. Or, for extra challenge, have the game randomly choose between the speeds.
To make it more interesting, rename the song files to something that hides what songs they are, so that even you don’t know what song is playing!
It’s a lot of fun, and much harder than you’d think. Buy it now for only $1.