Full list of all 10 Amazing Alex achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Windows Phone.
Create your own level
Complete a downloaded level
Complete all levels in The Classroom
Complete all levels in The Backyard
Complete all levels in Alex's Bedroom
Complete all levels in The Treehouse
Collect all stars in The Classroom
Collect all stars in The Backyard
Collect all stars in Alex's Bedroom
Collect all stars in The Treehouse