Can someone modify JTFE to have a shuffle button?

[Luka tv]

JTFE is great and it reminds me of the queue system on streaming services like Spotify or YouTube Music, but the shuffle button is missing. I tried getting the SDK but I get error 403. Also tried through wayback machine, and still no luck. So I would really appreciate if someone is able to do what I previously said

[thinktink]

AFAIK JTFE is not open source.