Grid Start

Five red lights. The instant they go out — tap! Measure your reaction down to 0.001s, climb the world leaderboard, and collect all 31 machines.

■ One rule. That's it. Five red lights come on, one per second. The instant they all go out — TAP! A racing-start reflex game that measures your reaction time down to 0.001 seconds.

■ What's your rank?

• Under 0.18s … Pro Driver
• Under 0.23s … Semi-Pro
• Under 0.30s … Amateur Racer Slower than that? Play and find out.

■ Earn coins in Best of 5 Five runs in a row — your average time decides the reward. Jump the start (tap before lights out) and you're done. The tension is addictive.

■ Collect all 31 machines Spend your coins on the gacha and build your garage. Animals, weather, myths, celestial bodies — 31 machines across rarity tiers. And one Secret machine nobody talks about. Obtain it and see your number: "Owner #N in the world."

■ World leaderboards Compete on Game Center with two boards: best single time and best 5-run average.

■ Send a challenge Share your result card and ask your friends: "Can you beat this time?"