A balloon has no steering. Horizontally it is the air, and the air goes different directions at different heights — right down low, left up high. So you fly the box: heat to climb, vent to sink, and choose which wind is carrying you.
Three markers in order, then back onto the field you left. Nothing you press happens when you press it: heat takes seconds to become lift, lift takes seconds to become altitude, and altitude takes seconds to become drift.