Relay Room is a free arcade that runs entirely in the browser. The games are original, short, and built to work with a finger or a keyboard. There is no account.
Scores are kept in this browser only. Clearing site data removes them. The dashed boxes around the pages are reserved for advertising later. Until a network is connected, they point at other games in the room and are labeled as such.
The site is static HTML. Pages, art, and game files are published together. Nothing you do in a game is sent to a server.