Didn't make the 4k deadline, so I've entered in the demo compo.
Thats why there is no sound!

Run the horison.com file. It uses a 320*200*32 video mode. If
the video card do not support vesa 2.0 in bios it will probably
not work. If it can't set the mode you might get a garbaged
screen, or a blinking cursor in the upper left corner.

If you absolutely can't get horison.com to run, you can use 
horifake.com instead. It uses a fake mode (640*480*256).

Good luck!