When you make changes to the song, the URL is updated to reflect your changes. When you are satisfied with your song, just copy and paste the URL to save and share your song! Notes go into patterns, and you jungle theme cake edit one pattern at a time.
Those numbered boxes at the bottom of the editor are the different patterns you can edit. Click the boxes to move to a different part of the song, or click the arrows on the currently selected box to swap which pattern is played during that part of the song. Most rows can play melodies or harmonies, but the bottom row is for drums. The purple loop underneath the numbered boxes controls which part of the song is currently repeating. Move the loop to listen to a different part of the song, or drag the ends to expand the loop to include the whole song. In the note pattern editor, you can click and drag horizontally on a note to adjust its duration.