for any of the songs to work, you are going to need to download the song that comes with.

step 1: get sound space quantum editor if you havn't already from here: https://github.com/David20122/Sound-Space-Quantum-Editor

step 2: get sound space + from here:https://github.com/David20122/sound-space-plus

step 3: go into sound space quantum editor and go to settings, then select "use SS+ for playtesting" and then select the exe for sound space +

step 4: load the map file (.txt or .sspm) and the audio.

step 5: press "play map" and sound space + should open and you can start playing!

if any of these steps do not work, report it in issues and i will assist.