My Altair also came with a 1K ram board (256 bytes standard, 768 byte upgrade to the full 1K). One of the first programs I keyed in was to play "Daisy Daisy" over an AM Radio by running loops to create interference.
Then there was the Cromemco Dazzler and a Kalidoscope program that was small enough to key in through the front pannel.
Once we added memory and a Teletype (Processor Tech got 4K RAM working before MITS). You could run Tiny Basic (less than 2K) and Tiny Trek, a Star Trek game that ran on a 4K system. It was a well balanced game.