Black square avoidance

This is a classic challenge game that once gained widespread popularity online. There aren't many players who can last for a long time, and I hope you will be one of them!

Gameplay: Click and drag the black square in the center of the stage with your mouse to start the game. During the process, try to avoid the moving red squares and don't touch the walls around the stage. The longer you last, the higher your score will be. Press the "B" key for the "Boss is Coming" feature.