Phaser
Phaser is “a 2D game framework used for making HTML5 games for desktop and mobile” — free/MIT (Photon Storm), JavaScript/TypeScript, running in the browser. One of the framework-based 2D engines the synthesis flagged as missing (with Flame and LÖVE). Source: Wikipedia.
Framework-based, browser-native
A library you code against, not a standalone editor — the same architectural class as flame-engine (on Flutter) and love2d (Lua), here targeting HTML5 via a Canvas/WebGL renderer (Pixi.js internally), deployable to mobile through Cordova. Ships three physics engines (Arcade, Matter, Impact) + tweening/audio. Phaser 4 (April 2026) modernized the renderer.
Place in the 2D/framework cohort
Versus unity-engine it’s “relatively lightweight” with a lower entry barrier; its niche is web-first 2D. Together with flame-engine (Flutter/Dart) and love2d (Lua) it lets the spoke start a real cross-engine 2D/framework comparison (host platform, language, renderer) instead of the single-data-point Flame it had.
Related
flame-engine · love2d · bevy · unity-engine · godot-engine