Well, working is one thing, fully working is another
Digging a bit deeper, there is a PD review (in German) on Amiga Futures site from issue #54 that shows this game as running on an A1000, so I loaded an A1000 config using a 1.3 KS disk and loaded the game, and the in game glitching is gone! The title screen still briefly flashes in the same places as on other configs but in game it appears glitch free, so it looks like this game needs an A1000 to run as intended.
Also, on AF's site are 2 screen shots of this game that differ from HOL and the one I have, HOL's shows the in-game BLIZZARD logo on a grey background with light grey text yet the AF screenshots show blue background and red text, so it looks like there is another version of this game floating around!!
Review:
http://www.amigafuture.de/kb.php?mod...light=blizzard
Screenshots:
http://www.amigafuture.de/asd.php?mo...e676017f2de4f0