Hi,
I created for my personal website a virtual photo exhibition gallery, in which you can change the size of the displayed picture on the walls (use combobox for that) and also change picture (click on the picture to open 'mosaic gallery', or use the arrows). Go in fullscreen mode to enjoy the gallery 
http://photo.maelbathfield.net/exposition-virtuelle/
At start, all the images are preloaded (=> loading progress bar).
Normally it is both compatible with desktop and mobile devices.