: In the official game, Serenity Valley is the final standard world, and beating its levels "Unbreaking and Under Budget" is required to unlock the secret Steamtown world. Version History and PLAZA Release Original Release : Poly Bridge 2 launched on May 28, 2020 .
: It introduced 16 brand-new, high-difficulty levels and their corresponding challenge versions. Key Features : New Theme : A peaceful valley aesthetic.
: The update added support for duplicating multiple items, accurate selection for boats and planes, and custom shape options.
: Since the Serenity Valley update, the game has received numerous patches (up to version 1.64) that improved stability, added language support, and upgraded the Unity engine. Core Gameplay Mechanics