Oh, I see. I'm guessing there might be some issues with your system then, if only a few of the games from the bundle worked. How are you trying to launch the games? From a file manager or the terminal? Do you get any error messages?
EDIT: I just tested it and it works fine for me. Downloaded the zip, extracted it locally in the file manager, and then just double-clicked on TonightWeRiot_Linux.x86_64 to launch the game.
The Itch client can be downloaded from: https://itch.io/app When you've done that, open your file manager, and double-click on itch-setup to install the client.