SweetDSL - Generate Web apps with MPS

I have just published a new project called SweetDSL that uses JSweet, a transpiler from Java to TypeScript/JavaScript to make web apps in MPS.  The code is recompiled when you visit a link like localhost:8080/sweetDSL/SweetDSL/sandbox/CanvasDrawing?reload.

Please let me know if you have any suggestions or if it is not running on your machine.  More information can be found on Github. Any feedback is appreciated.