Hey. I've been looking into Playcanvas for about a week or two and it seems awesome. I have some experience in web-design and have been playing around with different 3D game engines in the past. Playcanvas has been the easiest to get started with so far. They have a developer section with good tutorials and there is likely to be a lot more as the community grows. The cloud based designer works great too. To me it seems like a good alternative for Unity 3d. I made a bowling game with playcanvas last week to test it out and wrote a few words about it in my blog.