Added an OSX build in the game page. Thank you very much for volunteering to check it out :) (Of course there is no hurry and nothing would happen if you can't)
Unfortunately, there are a couple of issues with the mac build. The speed of movement is around 1/3 the speed of the web version which makes it hard to catch the music and zooming doesn't seem to have any effect. I don't think the lack of zooming is a dealbreaker but the speed thing probably is.
Thanks Akzidenz :) That's the kind of issues I was afraid of. I like testing every platform before making it available because you never know :S I'll leave the build available to download and document the problems in the description.