If I was doing it (as an ex demo coder) I would do as much as I could in emulator to make my life easier and then test it on the hardware and hope for the best. Demo coding is one of those annoying things where real hardware is absolutely essential because you are often doing things which aren't properly emulated.

This demo didn't impress me that much, I was actually hoping for more. Maybe I've just forgotten how underpowered the Amiga OCS was for things like this? Second Reality by Future Crew on the PC is still my #1.