I tried not to pick "level 1" tracks for each game because I thought that would be too easy. For most of them, they're pretty familiar for me and I've played through to the end, but I guess pretty hard if you haven't done so yourself. There's a lot of other PCE games where I have only sampled the first level and I'd be just as stuck. In some cases, like Ordyne, I feel like the style of the music has a lot of character and you might be able to attribute that style to a track without having played the level before.
Looking forward to future audio challenges! Straight up trivia would fun too if someone wants to take that on.