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.
All reactions with Philosophers' stone discovered
Episode Four passed
All Bad things created
All episodes passed without hints
Episode One passed without hints
Greatest Inventions quest completed
Survivor quest completed
Episode Three passed
Alle drankjes aangemaakt
Sins vs. Virtues quest completed
Save the Princess quest passed
6 elements created
10 groups created
Life created
Human created
Episode One passed
Episode Two passed
Games created
Element created 3 or more times
Similar elements reacted
Run, Santa, run quest completed
All reactions revealed