Timex/Sinclair 1000

Appears to accept user input and sketch with it.

Machine language program that prints random sized boxes with random character fills.

Appears to print random blocks.

You are faced with the task of exploring a sacred mountain of the Aztecs, in which one of their great leaders is rumoured to be buried along with untold riches in ancient relics. The only clue you have is that you must seek out a key which closely resembles a dollar sign.

You are in charge of Starship Astron and have just completed a mission in the outer limits of the galaxy. Having already landed your own craft safely you must land your radio controlled drones onto the constantly moving landing platform.