Stare at the main menu for a minute

Once you start the game just don't touch anything for a minute. The achievement pops on it's own, not when you start the game.


Complete the game

This should take very little time unless you stop to admire the views. Below will be some tips in case you want them.

In the very first section, you want to jump across the rocks and go into the green bushes instead of the red ones.

After finding the first statue in the pond, go in the direction the statue is pointing, but slightly to the right.

To enter the castle, jump into the moat and swim into the sewers.