1Pick a balloon, then pump to grow its prize or take profit to bank it. A pop loses that balloon's prize.
2Every pump pays more than the one before, so the last pumps are worth the most.
3Each type has a danger zone: below it a balloon never pops; inside it a pop can come on any pump, more often the deeper you go. Where the zone starts is new every game.
4Stopping before the zone is safe but leaves points behind. The best players go a little way in. Thirty balloons; your score out of 1000 judges each stop by its odds, so bad luck does not count against you.