Emanuele Feronato • 7/21/2026

Build a HTML5 game like Geometry Dash using Phaser 4 and TypeScript, with a simple custom physics engine

This article explains how to create an HTML5 game like Geometry Dash using Phaser 4 and TypeScript, featuring a simple custom physics engine. It covers the trick behind the cube's rotation (purely cosmetic with a snap to 90 degrees on landing), the decision to avoid Phaser's Arcade Physics for deterministic and portable simulation, fixed timestep implementation, level design as 2D grids, and a clean architecture separating physics, levels, and rendering. Includes full commented source code.

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#TypeScript #game development #html5