Double click the green BF and regret yer visit. WSAD to summon notes! Arrow keys to sing! You can even chart and change the characters! How you do the charting is go into Chart Handler and use the blocks to chart and make your own mod!
I also need some help with the sustain thingy for the notes because I'm not educated with code from scratch that much so that's why I usually remix so if you make a remix of this to fix the problem, call it "FNF Mod maker + Sustaining notes" and I'll remix it so that all of you guys can remix it too.