It's been in development for 6 months already, but a few days ago Finnish studio Rocket Pack announced their new engine to the public. According to the developers Rocket Engine allows for plugin-free, cross-platform browser game development.
The engine comes with Rocket Builder, an editing tool that enables developers to build a game without coding experience. An interesting detail about this editor is, as you can see in the promo video posted below, that assets are uploaded to the cloud, much like Google Docs. This means developers are theoretically able to work on their game from anywhere.
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