I have a 10KV electric fence. 5KV to 15KV is typical electric fence voltage in a farm or bear prevention fence. Can’t feel a thing unless you actually touch it.
They are also not lethal. Very low current, just very high voltage. So it only hurts like fuck, but won’t kill a human, cow, or any other mammal that touches it.
Installer file is a direct link to an executable file from their website. They contain the full game inside the installer. There’s no reason you can’t download that on Linux as long as you have internet and a browser.