I've made a Soundcloud playlist with a bunch of the songs, which can be accessed from here: https://soundcloud.com/yal-5/sets/yaru-demo
Turns out I've only included stuff from the 32-bit and Adaptive music packs in that playlist, though... derp. All right, I'll get proper demos for the 8-bit music packs together, should be uploaded later today. Thanks for reminding me! :)