In the "Rapid Flow Buoy" mode, the fixed distance is 400 meters. Using the standard paddling posture and force, players control the on-screen character’s “direction and distance” for each paddle stroke. Yellow buoys in the game provide a speed boost when passed. Paddling posture should follow the instructional video of the on-site equipment. Judgments are based mainly on angular velocity and acceleration. Actions not conforming to proper paddling, such as horizontal shaking or forceful hitting, are considered violations. To clear the stage, reach the finish line within the time limit. The final time displayed on the screen is used as the score; shorter times rank higher. If times are identical, the second criterion is average force, and the third is motion similarity.