That's great to know, A4000_Mad. Someday I'll have a PPC Amiga and be running the real game too. PAL/NTSC monitors always show those old low res games nicer than a PC monitor, it must be the scanlines and the slight blur between pixels that makes them look better.
Here's the latest version of the Sonic game I've made. This is it for me, I'm giving the project to the community to continue now so I can get back to working on real Amiga games. I have added a very short second level. I've pushed Backbone to its limits, but this demo should give people an idea of all that's possible to make a Sonic game. You'll see what I mean, and sorry about the jerkiness, it's as smooth as it gets in Backbone.
http://www.spin.net.au/~amiga/Sonic030.lhaThis one is also optimised for running on a 030, so it's somewhere between the other two demos in terms of screen size and speed.
I'll set up a web page with all the relative files for people to download and have a play around with in Backbone. I'm not "giving up" or anything, but I never even intended to keep going this far with this Sonic game, since I really should be working on graphics for Annihilation and Halloween Nightmare. So I hope others will want to continue with the game, there's a lot of potential for something fun in there.
I hope you enjoy, I've done the best that can be done within Backbone's limitations.