If you are paying or playing this game to get smarter, stop. The pseudoscience claims are nonsensical and are rich in hype and poor in evidence and data. Evidence strongly suggests that any improvement is applicable to the specific task but has no generalised benefit; you might become great at Must Sort, but the improvement will neither do you good elsewhere nor make you smarter. I resent the dishonest and overhyped pseudoscience, but the games in themselves can be fun.
abitdodgy about Peak - Brain Training, v2.14