Hey!

In my several playthroughs I couldn't figure out how to unlock this achievement. If you also need some help, I got you!

On the final level you have to go through a hidden passage. The path is something like this:


The achievement will unlock as soon as you enter the secret room:

If you have any questions, suggestions, criticisms, found any mistakes and so on, please let me know!

Shoutout to sweeter for letting me know where to find this secret!

Thanks to the developers for making a fun game and thank you for checking out my guide!