Amiga Addict Magazine featured a 12 level version of 'Spheroid' on their virtual coverdisk.
I've seen this available for download in other places now and I'd rather it come from an 'official' source, so please download this version below. It features a few different levels to the 10 level version, a loading screen with some music and different title screen music.
Download:
https://www.arkanixlabs.com/downloads/S ... DemoAA.zip