This Achievement is currently unobtainable. All the levels are not in the game. I have 10 Stars on all 16 levels, I have beat all available levels without dieing and on Hard mode. I have gotten all the secret areas and this achievement and the finding all secret areas achievement have not popped. I looked at the PC version of this game and they have levels that we dont, also there level order seems different so something is wrong with this game for sure. I do have guides up on youtube showing how to beat all the current 16 levels and find all the secrets please check them out!