A small world of cubes that tests your brains speed by simply tumbling. The game has multiple levels, each level has its own difficulty, as the progress increases, the difficulty will gradually increase until you feel the brain are burning.
As a developer, we also found it a bit too difficult at the beginning, but we also constantly figured out that the most fun part of the game is not the result, but the process.
Come on, believe you are the smartest person in the world.