Fail & boring
Not another game of this type? they're so boring and it's not worth making dozens of them...
If you make it possible to choose the language, translate it at least right.
I'm a native speaker of german, and what you made there is a single fail!
a better translation would be:
the title: "Verlorene Zahlen"
the instructions: "Finden sie alle fehlenden Zahlen in jedem Foto um das Spiel zu beenden. Viel Glück!"
and for the button "Spielen" (with a "N")