How to Get The Secret Ending
The mirrors loop their sounds as they’re hit. A mirror has 8 different sounds that loop, with 5 of them having a clear unique pitch overlaid.
The other leftover 3 sounds are filler so you know where the start and end points are.
The 2nd mirror changes loop when you move it with the button, making 3 different loops.
To save you the effort, the code is:
- 52143 12453 31425
And then the step after all the unlocks are used: Wait until after the credits.