To move Nemo:  use the arrow keys.
 
Removing dirt:  Sometimes it's very useful to remove some dirt without moving Nemo. To do this, hold down the spacebar and hit an arrow key to remove the dirt.
 
Charging the Energizer:  Move the balls into the energizer to charge it. When erergizer is charged, Nemo can use it as a teleporter to go to the next level. Jump in to teleport.
 
Bad Guys and Rocks:  Nemo can kill bad guys by throwing rocks at them. Killing bad guys also means big explosions! These explosions can be useful to blast an entrance into a brick wall.
 
Key and Door:  To open a door, get a key.
 
Exploding Barrels:  These explode when they hit the ground.