No info in help, manuals. I want to see game, but have not idea what do with downloaded file (if you clic view). Someone can write little guide about it?

just double-click the file. It should be launched with java web start. This of course requires a more or less up to date java version to be installed.

if the double click doesn’t work, search your java installation for a javaws.exe and use this to open the file.