Source vs Goo Create

Valve's official documentation website is great for newbies. It demonstrates the pros and cons of the engine (and since the website isn't maintained by Valve, but instead the community, the pros and cons are largely unbiased). There are also a number of pages dedicated to entities used within official Valve games and also community-made mods that were turned into full-fledged games by Valve. These pages explain the ins and outs of how most source programming works. There are also guides for Valve's tools which are both included in Source SDK and in any Valve-developed game.

Since it has precalculated lighting, this engine is great for low end PCs too.

You don't need to code your own door or ladder etc. You can pretty much use every entity used in Half-Life 2 yourself easily.

Of course you can program stuff into source but for level design only, source has a really easy input/output system for your level logic (e.g. doors, trigger when player walks into room...).

Source includes Source Filmmaker, a video capture and editing application.

Since GooCreate is native to the Web and uses WebGL directly, finished projects usually have a much smaller (sometimes orders of magnitude) download sizes compared to tools like Unity.

The visual state machine editor in GooCreate enables the addition of advanced interactivity without having to directly code it in JavaScript. Artists can add movement to objects, react to clicks and other events or even trigger changes in other state machines via events.

GooCreate is tightly integrated with the Cannon.js physics engine making it super simple to add advanced physics simulations to any project. Cannon.js is available at http://www.cannonjs.org/.

The Goo.js engine is fully open source and available at https://github.com/GooTechnologies/goojs

Usually when publishing you are forced to use a template provided by the service (with a logo, social buttons, etc) or you have to download the project to customize it. In GooCreate you can pick from a few different configurable templates and then, if that is not enough, you can add custom CSS and JavaScript that gets added to the page header (i.e. JS and CSS will be run/applied before the scene even starts to load) letting you style the loading screen and any other aspects of the page without having to download anything and still being able to make use of the hosting service GooCreate provides.

Material editor supports diffuse color, normal maps, specularity, emissiveness, opacity, reflectivity and refractivity.

Post effects including bloom, motion blur, anti aliasing, levels, contrast, vignette and edge detection.