Click a song to play it. When it's over, you'll be asked if you want to play it again; type "Yes" if you do and hit enter/return. Otherwise just type anything else and hit enter/return. Click "Play all" to play all of the songs in order. When playing all, press the right arrow to skip. Change #atonce to change the number of songs you can play at once, and change Volume to change the volume.
Thanks you, dragonlover73 and FlippyCatFan! Use with my project, Scratch Dash 1.8! https://scratch.mit.edu/projects/97026825/ (copy and paste in URL box)