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