Hey Guys & Gals!
I have a 100% Achievement Guide for this game if you prefer a visual!
Once you follow the Kobold up north, he will talk to you for a bit about certain things that are happening and take you a few screens up north where you eventually reside in a Courtyard complete with water fountain.
There is a crow on this fountain who saves your game but it will cost 1 gold coin everytime you want to save (So use them sparingly).
Just simply talk to the crow, saves your game, achievement unlocks!
Go to 13:45 in the video to see how it is done visually.
Hope this helps!