I tried the languages I know. Pretty cool! For my next language I'm starting now, this makes me want to start reviewing numbers even though it's not something I

I tried the languages I know. Pretty cool! For my next language I'm starting now, this makes me want to start reviewing numbers even though it's not something I generally focus on at first. Suggestion: make the lowest time at least 20 or 30 seconds, as 10 is too short. Second suggestion: a visual component where you could utilize shop signs with prices on them (http://i.imgur.com/wsg5BU4.jpg http://i.imgur.com/wsg5BU4.jpg) but I'm not sure how that could benefit the user, maybe the user has to type out the number (like "fifty seven").