You control a circle with a number on it. Other circles with different numbers on them enter the screen and continue to move in it for a few seconds. You have to move and collect the ones with a lower number than you have to earn a score and at the same time, avoid hitting the circles with a higher number. Also note that every time, your number changes. So you need to always keep an eye on your number to decide what to do next. The number of laps and their movement speed will increase as you progress, and so it becomes more difficult.
Computer-click on the mouse button
Smartphone, tablet-touch on the screen