A fun little game made inside of a CodePen.
You start with two coloured dots on the screen, one red and one blue.
You can switch their positions by clicking the mouse button.
Random balls will come from the top or the bottom of the screen, and either Red or Blue in colour. You need to switch the order of the dots so that the Red hits Red of the Blue hits the Blue.
Simple but slightly addictive.
See the Pen Color Collision by Dev Loop (@dev_loop) on CodePen.