Well I wanted Zentune to be more of like a companion application to listen to relaxing sounds, you know, while maybe the user is coding or something for example.
Also Zentune was just a little something I wanted to try to learn Unity, and I am on a tight schedule now, so I don't think I will be able to dedicate more time on this one. But hey, the project's open source! So if you are feeling like it mate, you can go ahead and try implementing a full-screen mode yourself :)
Thanks for the feedback buddy I appreciate it. Cheers!