Here is the full list of all 18 Crab Dub achievements.
Beat the game!
Unlock the final boss!
First zone completed!
Pop 100 bubbles
Second zone completed!
Chop 100 ice cubes!
Destroy 10 apples
Destroy 10 missiles!
Use 10 hearts
Start the game on the little duck!
Third zone completed!
Jump 100 times on a space donkey!
Start the game in space!
Inflate 10 kittens
Kill one Octopus
Jump 10 times on jellyfish
Activate the magic pill!
Start game for the Crab!