In desktop, dragging outside of the square canvas (and of course outside the windows) doesn't quite work.
I wonder how you would fix this, I think you could "capture" the cursor, and use esc to return it, not sure if that works in the browser.
If you like it, you can build your own levels with my builder tool: https://ehmorris.com/bubbles/builder/ and share the levels here or via Github.
I wonder how you would fix this, I think you could "capture" the cursor, and use esc to return it, not sure if that works in the browser.