PUZZINGO Secret Bonus Puzzle Access

To access the secret puzzle, just double tap then swipe ON the swinging fire-fly lamp or Android balloon that you will see on the upper right corner of the opening scene.
Instructions for Puzzingo Secret Puzzle (version 5.45+)

Incidentally, if you don’t see the Clown screen on your app, you just need to exit back out to it:
How to exit Pack Selection Scene

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NOTE: for older versions of Puzzingo (v5.34 and earlier) – Please double tap then swipe ON the swinging microphone.
Puzzingo Secret Puzzle Instruction (after Version 3.11)

NOTE: for even older versions of PUZZINGO (v3.10 and earlier) – Double tap then swipe ON the bouncing clown on the Opening Page of the app.