More games from the same shop
Three games from Pour Investments LLC. All free to start.
Lights Out: Top Reaction Test

Five red lights. One blackout. How fast are you?
A reaction time test built on real race-start timing. Four game modes, hundreds of levels across five motorsport eras, global leaderboards, and a daily challenge that is the same for everybody in the world. The average person clocks 250 milliseconds. The professionals are under 200. Find out where you land.
On the App Store and Google Play, and it has its own site at gridreactiontimer.com. Google Play lists it as Lights Out: Reaction Time Test. Same game.
Loop Break Racing

One new track every day. Race it. Beat the world. Come back tomorrow.
Every day there is one new track and the whole world races on it. Three laps, your best one counts, and a lap takes less than a minute. At midnight the track disappears and a new one arrives, and everybody starts fresh. Racing daily unlocks name frames, victory taunts, medals, neon trails and ghost replays.
iPhone and iPad only. There is no Android version yet. It has its own site at loopbreakracer.com.
Piggy Smash: Hammer Time
The one whose website you are standing in. Smash piggy banks, sweep up the coins, and pay the bills before the Collector takes his cut. Offline, no ads, one purchase.