How to solve the "All the cakes, forever always" achievement error:

So you solved absolutely every puzzle, including the very hard last one of the "Mystery World" and you are absolutely sure you did so, yet the "All the cakes, forever always" achievement didn't popped? It wasn't yet given to you, and you are sure it should have been? This happened to me too. I solved it by doing this:

- Go to Eets Muchies' Steam Workshop (upper menu after clicking your Eets Munchies game link in Steam)
- Go to Subscribed Items (the right area of the Steam page)
- Check the subscribed puzzles and unsubscribe from the ones you haven't solved (I unsubscribed from all, to be sure)
- Upon restarting the game, the achievement was given - problem solved.

Hope it helps you too, I kinda panicked when I finally solved that last puzzle and the achievement didn't show up.