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