Browsing as guest
Pick a category, then a game. Tiles stay square as they fit the screen.
Each title is a tile. Disable hides it from the arcade. Toggle TV, pad, controls, and joystick options. Phones only turns the others off. Each switch saves to the server — look for Saved on the tile.
Add Games to your Home Screen to open it like an app.
On iPhone use Safari: tap Share, then View More if needed, then Add to Home Screen.