I wouldn't say that it looks too bad. Bearing in mind the limitations of the harware on the Amiga. PPC 603 is hardly cutting edge, and neither is the Bvision or Voodoo 3 (still a useful little card though... I have one lurking about somewhere).
It surprises me that anybody still puts in the amount of time and effort to produce games for such a small market. Hats of to these guys for their efforts, even if it doesn't look state of the art.