Wow. That's pretty impressive for X68k. I assume this was a doujin release, since it says 1998 on it.
I remember the doujin Windows shooter scene back then was really interesting since, ironically, they would often pride themselves on not using any Direct Show/Draw/X/whatever features or linked libraries or anything and running everything out of one .exe that was 700kb or whatever and still generating very fun and impressive stuff.
Still looking for a full version of that Les Misrables fighting game. That thing was the dogs balls, from what I could tell from the demo. Victor Hugo versus Street Fighter III.