wp-screensaver

I realize this plugin is old and outdated it works (kinda) but has very poor instructions. Only snow and cube work for me. The rest do not. 1. the are no instructions/examples on using the settings. Doesn’t tell you how you input the time. 10s 10000ms 1min etc??? 2. selecting “background image” does not work or Im doing something wrong. I selected the image but the settings box doesnt exactly tell you what goes in it…css/html??? Again could also be due to outdated plugin but it isnt helpful that instructions arent clear this would be perfect if you actually provided instructions on its usage there isnt anything in the screneshots that would indicate what i put in the settings boxes.