Click the green flag to start. Use Q - V to play the notes. Hold the up arrow key to play the note sharp, use the down arrow key to play the note flat. There are 21 different instruments, use the left and right arrow keys to switch between them.
Pressing the up/down arrow keys while a note is playing will sharp/flat the note while it is being played. As of 9/30/2020 this project is not working. If you want to fix it, you're welcome to remix the project.