(Early Test - 4 Days before deadline)
I really like the 'wave to start' menu you have. The overall look of the app is very clean and polished, and I enjoyed playing with both English and Russian. Often found that words would be repeated straight after completing them, maybe a system for ignoring the last completed one from the selection would help here? Also with the scoring mechanism, maybe separate this out into a 'time trial' mode, while also having the normal sandbox mode? The scoring is cool but having no losing conditions makes it less meaningful (perhaps I am missing the point here, my background is in games).
Nice Work!