The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Evgeny EGOROV:
Brain Game is an all-age math game designed to sharpen your math skills! Compete against the clock to unlock achievements, increase your score, and compete against players from across the world! (Game Center required for achievements and leader boards to be available)There are 3 levels: - Easy: Addition and subtraction. All numbers are positive integers less than or equal to 12. - Medium: Addition, subtraction, multiplication, and division. All numbers are less than or equal to 12. (In division problems, the divisor is less than 12). - Hard: Same as medium with numbers less than or equal to 25. - Expert: Same as medium with numbers less than or equal to 50.There are achievements for answering problems correctly and quickly for each level of difficulty (easy, medium, and hard). The sharper you skills, the better the score!