Hit the bullseye for the first time

Fly a rocket for the first time

Get hit by the toilet for the first time

Achieve at least a C in each level

Achieve at least a B in each level

Achieve an A in each level

Get your first star

Pick up a life

Fall to Earth

Make a barrel explode

Finish levels 1 to 3

Finish levels 4 to 6

Finish levels 7 to 9

Finish levels 10 to 12

See all the Walters billboards

Get help from the goat

Play a bonus level

Fly with the bird

Use the shovel

Find all collectables