Poly Bridge 2 is a physics-based bridge-building puzzle game. Players design and construct bridges over various gaps using a limited budget and selection of materials, such as wood and steel. The goal is to successfully carry vehicles across without structural failure.

Gameplay involves placing nodes and connecting them with structural pieces, then testing the design in real-time. Touch controls allow for intuitive drawing, moving, and deleting of materials. The campaign features numerous levels with increasing complexity, introducing concepts like hydraulics and moving parts.

The mobile version includes a sandbox mode for free building and community features to browse and download player-created bridge designs. The core challenge lies in creatively solving engineering problems within constraints.