Judas Priest = Hell yes.
You could have mentioned "Turbo Lover" as another Judas Priest <> TG-16 connection.
I am glad you posted this because a lot of folks here might not know about the connection in cover art.
The biggest problem with Ballistix is that it is executed poorly. Perhaps the concept/mechanics could be fun...but as the HuCARD stands, it's just a mess. I never played the computer version(s) to compare.
Psygnosis used real artists for cover art (Shadow of the Beast, for example, was also painted by someone who did rock album covers—not sure if it was same artist as Ballistix).