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