Select your note/rest. Use the up/down keys to move the note/rest on the stave, use s to sharpen notes, f to flatten notes and d to make it natural again. Press space to place it. Press play to make sure it sounds alright, press save to name your melody, and remix it with your tune! Have fun creating your 21 note melody!
This took me a while to make and there are still lots of bugs. - Sometimes it doesn't play it right if you put multiple rests in - I don't know why. It won't play again afterwards if this happens. I made this all myself so no credits. The sound for the notes was from the sound scripts.