Here is the full list of all 13 Catie in MeowmeowLand achievements.
Got rid of the snake peacefully
Completed the tutorial
Fixed the radio
Collected all the stars
Finished the game
Lit up 20 matches
Found all the eyes
Heard 100 meows
Activated all sphinxes in the credits
Finished the game in 90 minutes
Poked Catie 100 times
Found all 6 hidden gems
Solved the terracotta cats puzzle in under 30 seconds