Click the flag, then the button corresponding to the theme you want to play. Press the spacebar if you want to stop the music before it ends. Actually, I didn't find the regular theme or the regular French theme in anyone's Scratch projects (thanks for that), so I pulled parts from the full theme to make them. Also, not to brag or anything, but I did it almost perfectly!
The songs and the picture belong to Miraculous. Favorite if you love Miraculous! Love if you're excited for Season 3!!! Update 1.0: I made it so you can't play more than one song at the same time. Update 2.0: Added the French themes! ...for no reason. XD Update 3.0: Added lyrics to the English themes. Update 4.0: Added my intro, to play when the flag's clicked.