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The world guaranteed this Reaction Test Game!
No.1 Education Category in 4 Countries.
Also it took the top 5 and top 10, in 28 and 38 different countries.
Let's play the best Reaction Test Game!

About Fastest:"Fastest = Fast +Test"
You just need to act quickly to get high grade to following stimulations.
1. Screen turns Yellow!
2. Device Vibrates!
3. Spider Falls!
Just tap the screen as fast as you can!

After playing, you can compare your grade with other players.
Furthermore, you can find your alertness and fatigue levels can effect on your playing. For example, caffeine or alcohol. Any factors can change your results.

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Thank you for playing!
* Designed for both Tablet and Phone