Here's a collection of loopable chiptune music I created and never used.

https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/playlists/1632189652&color=%235c4c48&auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false&show_teaser=true&visual=true

Mostly inspired by the original Castlevania series music, these tracks are well-suited for platformers or level-based games though you can use them in whatever way you want.

Erebus's Chiptune Collection by The Erebus (itch.io)

Okay, but please write a few words about your music like the rules say.