Jump on some enemies to defeat them, but U can get hit by them. Collect enough Power Bolts to proceed to the next level by going back to the world map via the Rocket Ship. Collect 30 coins to gain health or hit a heart box to heal completely. Press and hold X to pick up shells, release to throw them. Shells can break bricks, defeat enemies and collect coins when thrown. It is important to use the move set to your advantage in this game, as it may not be possible without it. And most importantly, have fun!