This is a falling sand game, based on the idea found in a game from dan-ball.jp. It is written in x86 assembly, and the binary fits is 512 bytes.
In order to run it, you need nasm. After installing nasm, simply run the
Makefile and the .flp file will contain the binary. This file can then be
written as the first 512 bytes of an usb, which will then be bootable, or you
can put it in a floppy controller in virtualbox.
Move around the cursor with arrow keys. Press s to pause/unpause. The keys 1,
2, 3 and 4 (not numpad) will spawn the various materials available.
List of materials:
1 ' ' : air
2 '#' : wall
3 '~' : water
4 '.' : sand
Wall and air never moves. Sand and water falls if above air. If sand is on solid ground it will form a pile, and if water is on solid ground, it will form a lake.