The buttons with words on them are pretty self-explanatory. The top left shows what song is currently playing. Pressing the pause button will play the song very slowly and set the volume to 0, and the skip/back buttons will do just that. The loop button beneath the back button will put the song on loop, and the shuffle button beneath the skip button will shuffle the queue. The lyrics button currently doesn't do anything, but the queue button will hide and show the queue. You can adjust the slider for the volume on the top right. To show playlists, press the number key designated to that playlist (1-5), and press shift+number key to play the playlist. To hide playlists press 0. If you want to add your own song, then first copy the link of the song and use a downloader (be careful which one you use) to download the song, then add it to the play button sounds. Make sure to rename it to the name of the song, with the format of Song Name - Example Artist. Then add that same name to the songs list, and add it as a costume to the current song sprite. If you cannot save the project, then the audio file is too big. To fix it, use an audio editor to cut the file in half. Add the first half of it as usual, but for the second half only add it to the sounds in the play button, and make sure to have a 2/2 at the end. This has not been overly tested, so if you see any bugs please let me know!