Mustache Draw!

1.16.0 - Top-level Undo (long press "Undo" to expand Undo menu)
1.15.0 - added cover-screen toggler (upper right menu)
1.14.1 - bugfix: retain drawing on screen rotate
1.13.5 - fixed crash on some devices (share feature)
1.13.0 - added color indicator to bottom menu