Support for Mobiles

The typical mobile touchscreen is 800 by 480 pixels.

The Shellsort Slideshow is 800 by 435 pixels, and fits well on a screen. The control buttons had to be made bigger and set wider apart than was originally designed on the PC, to make it possible to press them correctly. Striking them reliably can still become a problem. Key bindings for the forward/backward controls might help this a lot. But there is the problem that there could be multiple entities on the page that compete for the keys. We have not yet solved this issue.