Here is the full list of all 16 Mekorama achievements worth 1,000 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox One.
Complete all Medium Levels
Complete level 48
Complete level 47
Complete level 46
Complete level 35
Complete level 28
Complete level 27
Complete all Easy Levels
Make your first level
Electricuted by an electric NPC
Complete level 17
Complete level 14
Complete level 13
Complete level 7
Complete level 4
Complete level 1