I had an idea about the iPhone version. That should be possible. But it would be quite an "awful" work (it would require the player to clic on a button when the music starts :/ ), cause we can't play audio in background with Safari iPhone.
If you want a version for any other device (phones), please tell me, and I'll give it a look if possible ;)
Edit : the device has to support html5's <canvas>
I'm still working on (linear) sliders (still the drawing -- there are no built-in function to draw the outline), but it looks much better. For those wondering, tests are not on osu-web right now, I'm just trying to make it work before adding it in osu-web.
If you want a version for any other device (phones), please tell me, and I'll give it a look if possible ;)
Edit : the device has to support html5's <canvas>
I'm still working on (linear) sliders (still the drawing -- there are no built-in function to draw the outline), but it looks much better. For those wondering, tests are not on osu-web right now, I'm just trying to make it work before adding it in osu-web.