Input devices: mouse, keyboard, touch and gamepad support
Entity-component system: high level game object management
According to David Evans in his announcement on the PlayCanvas blog that the platform is now open sourced under the MIT licence
PlayCanvas exposes a game framework that implements an entity-component system, allowing you to build the objects in your games as if they were made of Lego-like blocks of functionality.
If you are thinking "OK, another game engine", it is worth pointing out that you also get access to a set of in-browser design tools that make use of PlayCanvas and allow you to work interactively.
The PlayCanvas Object Editor - what two chairs and a concrete barrier are doing in a game is a good question.
As well as providing tools to help you develop games, PlayCanvas also hosts them for you for free - but only if your project is public. If you want to have a private developement area then you have to pay $15 per month for a Pro account.
The PlayCanvas site has some games available for your to play and explore including Swoop which runs in both mobile and desktop browsers as is on billed as:
a great demonstration of what you can achieve with HTML5 and WebGL
Microsoft Virtual Academy has provided a challenge to devs for the month of February with Know it Prove it. The idea is that you engage in one or more of eight learning challenges, each with 28 days o [ ... ]