And last but not least, here's an absolutely beautiful demo. in two parts. It's 128K only, and apparently it only works on CRTC 1, but I had no problems whatsoever with my type 0 CRTC, so there.
Once the program has run, some garbage will appear on the screen - I assume that this is the demo. uncrunching itself. When this has finished, you'll get a menu asking you if you want to look at part 1 or part 2. If you choose part 2, another file will load and a picture of Sonic the Hedgehog should show up. You'll have to wait another moment; again because I think it's uncrunching. The screen will then initially go blank but the demo. should start after a few seconds.