Nifty, but lacks a point. If some of the numbers were missing so you had to guess where the next line should go, you could set a par value for number of guesses, with bonuses/ penalties for under/over par.
Bit too simple ?
Good idea to convert this classic paper game to a digital one. Maybe there should be more pictures to pick and some more difficult ones. What about a counter so that there can be a time highscore or something like that ^^ . None the less entertaining