"Border of gravity" will cause your brain to melt with rage. The task of the game is not difficult, you just need not to let the ball fly off the screen. Sound easy? The coloring of the game is constantly changing, and it is simply impossible to concentrate. Focus not only on the ball, but also constantly think about where and how your ball will fly. It will change its shape regularly, so at any time your ball can become a square or a triangle. And also, the gravity in the game is extremely unstable and if your timing is off your ball can fly off the top.