Hi Jeff! Thank you so much for the awesome writeup! Like Nathan said, we have a bunch of new features we want to add and we're working on those already - and feedback like this is super helpful for coming up with new ideas we didn't even think of ourselves. We both appreciate it.

One thing for drawing hotspots - if you make a mistake, there's no need to completely clear the canvas and start over. An existing point can be dragged to a new position with the mouse, or you can remove a point by using Ctrl + click. (On a Mac - not sure what the PC equivalent would be). That edit-ability is really nice, but as you've shown us, not terribly discoverable, so we'll work on that.

Thanks again for the nice writeup and helpful feedback.