Click on the lines to add notes, and press space for a demo song. The 'Speed' key controls the speed. Press 'p' or set the speed to 0 to pause, this lets you add multiple notes at once. Press 'p' again to unpause. Left/right arrows to control the speed, keys 1-5 to add notes Press 'r' to add a random note every fifth of a second.
All me I may add more songs, and maybe a way to place a note at any point along the line. I will add a way to record songs, and maybe add two more notes to the scale.