Click on a line number to bring up the code wizard.
Save and Load will save to / load from the browser cache.
To load and save your work to/from your local file system,
use Download and Upload.
The graphics and sound URLs are subject to CORS limitations,
so it's recommended you use data URLs.
A sprite editor is provided. It has CellScript import/export functions.
These are based on a tilemap statement with a data URL that you can
copy/paste as text.
