Maybe check out https://webamp.org/ and https://skins.webamp.org/? There's a bunch of really cool and cute themes already available and I know you can make custom themes yourself too, I'm just not quite sure how; but it is possible! Here's the github with all the info you need to add it to your site: https://github.com/captbaritone/webamp ^_^
Thank you SOO much :3 This means so much since I just adore your adorable site ;w;! Babymetal fans UNITEE!!!!!!
that would be interesting, but have you also considered maybe trying atabook? I've tried cbox, but they felt limiting on what you could control so I stopped using them.