Good Game!
Another suggestion is to make it INFINITE, which makes it Normal Mode or Infinite Mode. For normal mode, when you get back to C, you win, and if you win, you unlock the circle of fourths. For Infinite mode, you can add the spiral of fifths which is infinite. (Adding bb, a double flat and ×, a double sharp. You can add as many accidentals as you want.). You can also make the sounds microtonal. Anyways, bye!
Unnamed15