Thank you so much for taking the time to leave a review! We've definitely been considering polishing the game up a little and were thinking of the possibility of adding different characters to have a greater variety of instruments, but alas even with all this time, we still rushed to get our idea out haha! We'll definitely fix the knobs issue, and we'll definitely take into consideration highlighting the levels when selecting them! I'm glad you enjoyed our little band despite these hiccups in our game <3