Caution! This game is evil. It plays with our brain basic tendency to recognize and learn patterns. It looks at first sight that it's a pure twitch, fast reflexes response kind of game, but it is not. It's memorization and pattern recognition first and fast reflexes response second. Is that what makes it evil? No. The game while throwing at the player its hexagonal patterns at incredible speeds, bombards him with a high bpm soundtrack and flashing almost epilepticogenic graphics so to overstimulate his brain to purposefully make him fail. To break our brain. To make it vacillate. And hesitation, or trying to check the time from the corner of the eye, or even blink, will result in failure. The almost instantaneous retry/failure system makes for a near hypnotic chain of actions in a diabolic cycle of Game Over. Repeat. Game Over. Repeat. Game Over. Repeat. Evil. My most played game on any platform this year. I'm almost embarrassed to think of the amount of hours I played of this game.