Vactro 2 by Angels ->
http://www.pouet.net/prod.php?which=12004
On WinUAE2700b7 Quickstart A500 found problem with screen flickering when running first demo called Vactro Intro.
Edit: Unfortunately theres no any video, so only running it on a real A500 will show how suppose Vactro Intro should look running properly.