RMB is required.
Starts fullscreen. There is a configuration tool called Winsetup.exe theat can be found in the installation folder. With the Steam version the file can be found in
Driive:\Program Files (x86)\Steam\SteamApps\common\Primordia
Savegames need to be named, but you can overwrite the autosave file by mouse.
Enable Viacam clicks are not recognized only when set to >20 ms.
Some objects that have to be found are quite small but as soon as you hover the mouse over it there pops up a description.
Text is spoken and subtitled. This can be changed in the options menu.