This is no longer updated - For my current WebGL game framework check out https://github.com/Drazzke/foster
Small framework for TypeScript HTML5 games. Simple working on this in my own time.
http://noelberry.ca/content/tsplatformer/
http://www.typescriptlang.org/
You can compile TypeScript with Visual Studio, Sublime Text, or WebStorm. (or simply through the command line).
AmbientTS targets ECMAScript 5. When compiling the TypeScript, you need to specify this with: --target ES5