Super simple reaction game
Tap the green dot. Do not hit red.
That is the whole game. You get 20 seconds. Every green tap gives +1. Every red tap gives -2. The faster you react, the higher your score.
GoalTap only the green dot.
AvoidRed dots punish sloppy taps.
WinBeat your best in 20 seconds.
It works with mouse or finger, and the rules take about two seconds to understand.