Round numbers correctly to fuel your engines and blast higher. Miss the target and you'll vent precious fuel — keep your streak alive for booster stages!
Pick your starting grade:
Tap the correctly-rounded value (or press 1–4). The number line shows the two nearest multiples — pick the one your number is closest to. If it lands exactly halfway, remember: round up! Build a streak for booster stages, but wrong answers vent fuel, and running dry ends the mission. The game learns your weak spots and gives you more practice where you need it. 🚀