It seems to be a legitimate CD32 version of the game by the looks of it. The CD itself looks too 'good' to be a fake actually... The sticker on the otherwise neutral box also looks original. All hints at the game being genuine and not a well made 'fake'. The lack of secondary sources for an actual Amiga CD(32) release is a bit confusing, but I'd say it is a released game for CD32 by the looks of it.
If you own a scanner the box and CD would be very intersting to have as scans for an inclusion of the CD32 entry on HOL