Scroll to the bottom and tap the golden egg hidden behind the text.
It is important to note that using QA cheats can disable achievements and may cause the game to crash if you trigger too many commands at once. Since the official 2012–2015 versions are no longer supported, these tools are mostly used by the modding community to archive and study the game's history. Angry Birds Classic Qa Cheats
For those interested in the technical side, the QA cheats also provide a "Debug HUD." Activating this displays real-time physics data, such as impact velocity and structural integrity values for wood, ice, and stone blocks. It offers a fascinating look at the Box2D physics engine that powered the mobile gaming revolution. Scroll to the bottom and tap the golden