The good news is that the crash in Chrome is not due to issues in asm.js or WebGL. Apparently, this demo exposed a bug in Chrome's garbage collection. There is already a ticket in Chrome to fix it.
You can run it in non-asm.js browsers; the released version of Firefox can run it, for example. It doesn't crash, but it is slower. According to the FAQ on the game site [0], Chrome has a bug which is expected to be fixed soon.
Will it be much jobb to make this work in all browsers?