On acquaphoto(dot)com (not the demo, but the real site) the Kossel theme works fine on the Android phones I looked at it with.
acquaphoto.com was not created with Showkase. It is a WordPress site which uses the WP-Juicebox (the Juicebox plugin for WordPress).
is it possible to have just the gallery with the rotating images and the text block below (the other galleries and links are not needed)?
Yes. Create a Juicebox Gallery Page and add the text you require to be displayed below the gallery in the text editor.
On mine it is cropping the photo greatly and the images only auto rotate on a PC or tablet... not on the phone.
The photos in your gallery do not AutoPlay immediately on your home page because the gallery is displaying the Splash Page (and requires a click/tap from the user to open the actual gallery fullscreen).
If you would like the gallery to be embedded directly in place of the Splash Page, set showSplashPage="NEVER" (or screenMode="LARGE").
For more information on how Juicebox adapts to different devices and screen sizes, please see here.
I am not seeing "forceTouchMode".
The forceTouchMode configuration option was removed from Juicebox in v1.2.0. For a full list of changes, please see the Version History.
If you wish to force Juicebox to display the gallery in Small Screen Mode on all devices and in all browsers, it is now enough to just set screenMode="SMALL".
I have corrected the support page in question. Thank you for pointing this out.
how will it appear on a PC or larger tablet?
If you set screenMode="SMALL", the gallery will be displayed in desktop browsers in a similar manner to how it looks on a mobile device (i.e. an initial thumbnail page from which the visitor can select a main image to be displayed). The main difference is that there will be more thumbnails displayed per page in a desktop browser (due to the larger screen size). Try it in a sample gallery of your own.