Here is the full list of all 29 Maria the Witch achievements.
First 50 Mails
First 50 Coins
Completed World 2
250 Retries
1500 Retries
3000 Retries
500 Retries
First 10 Mails
Completed World 1
First 10 Coins
First 1000 Brooms
Beginner Take Off
Beginner First Coin
Beginner Landing
Beginner CheckPoint
Beginner Arrival
Beginner First Mail
First 100 Brooms
First 250 Brooms
First 100 Coins
First 100 Mails
First 500 Brooms
Completed World 3
Completed World 4
Completed World 5