When you play the game, your Wii Remote transforms into a paddle. You have to hold the Wii Remote like how you would hold to do Canoeing. The Remote is being held vertically with the sensor facing upwards.
The Speed Challenge is where the player races against time to reach the finishing point. The distance between the start and the finishing point increases whenever the player passes each stage.
The time limit also increases at the same time.
The VS mode is where a few players challenge each other to reach the finishing point as soon as possible.