You must add, subtract and memorize. Only with your brain you will be able to crack the code of the five safe boxes that make the game. Hurry up!, Time is running out ...
Millions of combinations, five levels per game and three kinds of skills to train your brain.
German, Spanish, French, Japanese
Requires Google Play and/or account:
Requires third-party libraries:
Requires 'rooted' device:
Minimum Android version:
Access network state
, Wake lock