Are your reaction times sharp?

After pressing the Start button, a sign will appear in the center of the screen with either "left" or "right" written on it within 3 to 10 seconds. Try to press the corresponding mouse button as quickly as possible! On a touchscreen, the two transparent white rectangles at the top of the screen represent the mouse. The game duration is about 1-5 minutes, depending on the version.

Let's see how fast you are!