First off, the trailer is not really a good indication of what to expect from Rippy (aka The Red), which seems to imply it is a comedy horror movie (like 2014's Zombeavers), but in fact the material is played almost entirely straight. The closest film that springs to mind is another Australian film, Razorback from 1984 in which a giant boar terrorises an Australian community. Here, it's a zombie(!) Red Kangaroo that terrorises a small Australian mining town. Razorback is the better film.
Michael Biehn is hopelessly miscast (although at least he does not attempt an Aussie accent), and his apparent overacting (particularly during the first act) suggests he thought he was making a different kind of film. The lead, Tess Haubrich, who plays the small-town cop Maddy who lives in the shadow of her father's legacy, does the best she can with what she was given.
This is clearly a low budget film, and the dodgy cgi and practical effects could definitely have used some more money thrown at it. The movie tried but failed to bite off more than it can roo.