Here is the full list of all 21 Let the Cat in achievements.
Used 75 hints!
Played 150 games!
Completed 50 locations with one object!
Passed 80 locations with 3 stars!
Used 50 hints!
Completed 100 locations!
Gained 250000 points!
Collected 250 stars!
Completed 30 locations with one object!
Used 25 hints!
Completed 50 locations!
Passed 40 locations with 3 stars!
Played 50 games!
Completed 10 locations with one object!
Gained 100000 points!
Collected 100 stars!
Completed 20 locations!
Collected 40 stars!
Played 250 games!
Passed 150 locations with 3 stars!
Gained 500000 points!