Here are my Marble Madness the floppy disks from my formative years as a little video gamer. I love that the game designers are featured on the insert, running away from the killer marbles like they're stuck in Tron!
Marble Madness was ridiculously hard but had mesmerizing isometric visuals. The title song is pretty rocking too. Here's an impossible speed run if you want to imagine what it's like to have world champion marbles.