Has anyone suceeded in running it in any browser on any smartphone? It seems to fail on Windows Phone's IE. However, it works perfectly in few desktop browsers (including IE9), I've tried.
Anyway it seemes, that gameboy game format could be used as some kind of lightweight format for cross-platform browser games. It could enable publishing small browser games without giving away js sources or using third-party plug-ins.
Same with the iPhone 4s, though it tried to download the .js file first and didn't start working until I hit back. Load time was also much longer on the iPhone 4 over the same connection. Low framerate is hard to play through :/