I completed two lessons of hiragana ending in さしすせそ and the app just froze, it doesn't let me continue or review anything else

Or else someone who upgrades might crash due to missing words

Happened during infinite review. See image on phone

If the new string is longer than the old one, the new one gets cut off

Right now after studying it goes straight back to the review screen.  It would be nice to instead see a new screen showing what you learned during the lesson and how you improved (or not!)

todo: Figure out how to best represent learning progress using a graph

Fix using screen debouncing??