Here is the full list of all 9 Doodler achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
People don't think the universe be like it is, but it do
Jump three fity times
Finish all the elder levels
Finish all the adult levels
Finish all the teen levels
Die 50 times
Finish all the child levels
Actually open and play the game
Play on July 23rd