It is a small game with a clever plot: after leaving your games in the window, they have spread across the room. You can still get them back, but to do this you will need to collect the code chunks in the correct order.

BCM (Machine Code Finder) has very simple graphics and sound, and moves with difficulty. It is programmed in Basic at a time when its author was embarking on other assembler projects, and is editable so you can see how the game is made.