[Jaxom]

That's a nice start; this could be quite useful. I've a couple of complaints:
1. Double-tapping to get a menu isn't reliable. I'm not sure what the criteria are, but maybe the app is expecting too fast or too close together.
2. Tapping on the defenses doesn't always bring up the defenses menu.

And some suggestions:
* Add an eraser, please.
* It would be helpful to enforce the "only one from each category" restriction for defense selection.
* Line width selection might be nice. Certainly not essential.