Hello! Honestly, there is no much game to it other than that screenshot :)
I'm not sure that it is not doable to make a build for webgl, but that won't be easy.
Do you have windows on your machine? In this case there is a windows build (I forgot to mark it as windows one though.) If you're unable to run it, probably you don't have OpenGL 3 support, in this case you can either update your drivers or download Mesa3d build for windows and place .dll file in the game folder.
I think I can make one for mac too, if this is the case, please tell me - I'll give it a try :)