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