Here is the full list of all 14 aMAZE achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
All Hard Unlocked
Complete all levels
All levels unlocked
Complete 50 levels
Complete all hard levels
Complete all medium levels
All Medium Unlocked
Complete 25 levels
Complete 10 levels
Complete all easy levels
All Easy Unlocked
Complete 5 levels
Start first level
Start game