v1.0.7:
• Tweaked tap sensitivity so fewer toddler-style taps are missed.
• {fixed} Back button no longer gets you stuck on the launch screen. While it may keep your little ones from leaving the app, it isn't the right way to do that.
• {fixed} No more silent crash when the app exits.
Prior new features:
• Drag with as many fingers as you want simultaneously (possibly hardware- and physiology-limited).
• Shake to erase the screen. (Shake again to restore an accidental erasure.)