I don't have a hardware wallet, that is why I want to make a paper wallet. Off-the-internet, of cause.

The website's twitter account is inactive, and there is a small spelling mistake. Should I just ignore that?
Last question, if I download the generator from GitHub, and launch it without internet - can I move coins to it safely, and expect them to be on the paper wallet?
That I won't be sending them to an invalid or wrong address, that the paper wallet generated is legit, and I will indeed - have my coins, in my control.

For a fact: I know about bitaddress.org, but I like the design on walletgenerator.net - better.