Our great sponsors
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EaselJS
The Easel Javascript library provides a full, hierarchical display list, a core interaction model, and helper classes to make working with the HTML5 Canvas element much easier.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Godot's web export would certainly be able to handle it. https://godotengine.org/
The game was created with CreateJS (https://createjs.com/). You can tell by looking within the JS file that starts out with "kitsune_compiled_.......".
There are plenty of 2D game engines in JavaScript to choose from: https://github.com/bebraw/jswiki/wiki/Game-Engines