Infinite health

Collect all 60 skulls.

One hit kills

Collect all 60 turtles.

Ship does not take damage

Collect all 60 seeds.

The Wild Things will not eat you

Collect all 60 bee hives.

Treasures appear when holding Back or Select

Collect all 60 geodes to have Treasures appear when holding Back or Select.

Trophies

Ace of Hearts (Silver): Earn 10 Hearts.
All Trophies Awarded (Platinum): All Trophies Awarded.
Allergen (Bronze): Cause three different Wild Things to sneeze.
Beekeeper (Bronze): Collect all Honeycombs.
Captain (Silver): Complete a Ride Carol mission without crashing.
Commodore (Silver): Complete a Sailing mission without crashing.
Demolitionist (Bronze): Defeat five Fireflies with one bomb.
Friend of Alexander (Bronze): Collect 25 Turtles.
Friend of Carol (Bronze): Collect 25 Houses.
Friend of Douglas (Bronze): Collect 25 Honeycombs.
Friend of Ira (Bronze): Collect 25 Geodes.
Friend of Judith (Bronze): Collect 25 Seeds.
Friend of KW (Bronze): Collect 25 Owl Eggs.
Friend of the Bull (Bronze): Collect 25 Skulls.
Galaxy (Silver): Find 65 Stars.
Geologist (Bronze): Collect all Geodes.
Glass Houses (Bronze): Start a Dirt Clod Fight with multiple Wild Things.
Greased Lightning (Bronze): Defeat 25 Lightning Bugs.
Green Thumb (Bronze): Collect all Seeds.
Gymnast (Bronze): Power-swing from three bars in a row.
Hamlet (Bronze): Collect all Skulls.
Hero (Gold): Complete the game on Normal or Higher.
Incubator (Bronze): Collect all Owl Eggs.
Jack of Hearts (Bronze): Earn 4 Hearts.
King (Gold): Complete the game on Hard.
King of Hearts (Bronze): Earn 7 Hearts.
Nova (Bronze): Find 5 Stars.
On Fire (Bronze): Defeat 250 Fireflies.
Real Estate Mogul (Bronze): Collect all Houses.
Star Cluster (Bronze): Find 40 Stars.
Stranger (Gold): Complete the game on Easy or Higher.
Supernova (Bronze): Find 20 Stars.
The Cleaner (Bronze): Defeat 100 Shadow Creatures.
Three Square Meals (Bronze): Be eaten by three different Wild Things.
Universe (Silver): Find 95 Stars.
Veterinarian (Bronze): Collect all Turtles.
Wild Rumpus! (Bronze): Defeat 15 enemies in a row in melee without being hit.
Worst King Ever (Bronze): Allow three different Wild Things to sink into oblivion.