A reaction time is measured on one billionth of a second.
Let's challenge one billionth of zero second !
[How to play]
Touch the "READY" button.( Five signals light up.)
Touch the "GO" button, when Five signals were "blackout (the light was put out altogether)".
In the game center, the time is displayed in the unit of a nano second. (one nanosecond is one billionth of a second.)
- 5.3 MB
- Update Date:
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