As subject. We've wanted to do this for a while, but last time an attempt was made, JaC64 was not quite up to the task. So we forked it on Bitbucket and for the past few weeks we've been busy fixing bugs in it. It's still not perfect, but it's playable on several platforms including Windows (Firefox and IE) and Ubuntu 11 (Firefox). So try it! Enjoy!
Check it out at http://catseye.tc/gallery/c64/bubble-escape-2k/