Phaser.io vs Starling

This is one of the most developed frameworks right now.

You can choose WebGL or classic HTML canvas element for game rendering.

There are plenty of great learning resources available for Phaser.io.

Most tasks are done just using 2 or 3 lines of code.

If you're browsing Slant, you probably already have a JavaScript enabled browser, which is most of what you need to get started learning JavaScript. The requirement to run a server locally on your computer while developing might make things a little more difficult

All you need to do is attach Phaser script to a HTML page even without installing any extensions.

Phaser provides a similar approach as to that of Flash games, where you can load assets and place them on a stage, and even improves upon the shortcomings of actionscript. It is very easy to shift from flash to HTML5 development because of this approach.

You can use it in popular online editors like replit, codandbox, etc.

The creator of phaser(photonstorm) has given the older(Phaser 2.0) source code to the community for their own maintenance, and has made Phaser 3.0 with a different style and approach, trying to make it easier for beginners to learn.

Starling is just 12k lines of code and doesn't try to do everything — but what it does, as efficient as possible.

With Feathers, you can easily add great user interfaces to your games — or even create business apps with Starling.

Starling is available for free with code available on GitHub.

Forum is always active with knowledgeable developers and with lot of inside info, and post mortems.

With UI, you can design it in Flash Professional (powerful 2D editor), export to swf file, use GAF convert swf file to gaf file, finnally, load gaf file to Starling. GAF can convert a lot of file swf to one atlas. Alway use same resource in design files (fla) to optimize atlas size, avoid duplicate asset in atlas.

You can use flash to create animation for starling.

Let the GPU do the rendering, the CPU has more important tasks to do.

It can be exported to web flash player, iOS, Android, Windows, and OS X

Using AIR's native extensions any native code that can be written can be run and used by the game engine.

New features are added regularly.

Starling can run more animated display objects than Unity2D and many others frameworks at 60 fps.