Suggestion: Add more categories to the turn on/off settings and add a debug section that can contain stuff that is useful to modders, engine makers, and charters. One useless but cool thing I would do is make a check box to have the "Test" song available through Freeplay when the checkbox in the debug section is on, and have the Test song use the old placeholder test stage as the BG.
Love y'all, devs! Keep up the work!