Here is the full list of all 22 Doodle God achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Greatest Inventions quest completed
Survivor quest completed
Sins vs. Virtues quest completed
Save the Princess quest passed
All reactions revealed
Run, Santa, run quest completed
Episode Four passed
All Bad things created
All episodes passed without hints
Episode Three passed
Alle drankjes aangemaakt
Games created
All reactions with Philosophers' stone discovered
Episode Two passed
Episode One passed
Episode One passed without hints
Human created
Similar elements reacted
10 groups created
Life created
6 elements created
Element created 3 or more times