In Carnivorous Canyons, Mr. Krabs gives you a launch machine. Use this to defeat the Pufferfishes. Do this by turning on the launch machine, press R to suck in release. Keep holding R. Then, when ready, release R to stop the release. This will destroy the Pufferfish.
Fish Hooks Park: Avoid hole
In the beginning of Fish Hooks Park, there is a rock formation followed by a big hole. To avoid this hole, jump onto the hooks above. They stay there for approximately five seconds. You have to jump off before then.
Jelly Fields: Get past Giant Jellyfish
In the introduction to Jelly Fields, Squidward mentions catching Jellyfish with a net. The Jellyfish look like bowties. This is the way to get past the Giant Jellyfish in Downtown Bikini Bottom.
Sandy's Tree Dome: Eliminate time limit
In Sandy's Tree Dome, there is a twenty second time limit. To prevent this, jump down from the branch below the last springboard. This gives you a water helmet. It takes away that time limit.