But the support was barely acceptable. The worst part about playing it on mobile platform is that my overuse of shadows, gradients and opacity makes the page lag like hell on those mobile browsers. (see update)
I think there might still be some bugs in the 'hints' function, which I kind of messed up, but other than that, the game is fully functional.
Next, I will write a solitaire and maybe a Hearts with some ajax :P HTML5 rocks!
update I found a way to drastically improve the performance of animation-intensive webpage on mobile safari: add a -webkit-transform: translate3d(0, 0, 0) to the animating element in the style sheet. This will cause mobile safari to use hardware acceleration to render the elements, thus improve the drawing speed. I am not sure whether it works for android browsers though, but the improvement is really amazing!