Most games here come in an archive, usually a zip file. You extract the archive, and the game executable is inside, along with all the data files. No installation is necessary; you just extract into a folder and run it. Some examples from the Palestinian Relief Bundle: BOSSGAME: The Final Boss is My Heart, YOU ARE A WIZARD, Fostering Apocalypse, Brush Burial... Basically every other game on itch. Just pick one arbitrarily from the front page, and I bet it'll be packaged that way. I think most games are packaged like that because that's what works with the itch app.
I appreciate the support! Thank you!