This is really cool! Do you mind if I ask how you did the possum shooting scenes? Are they point-and click-scenes with a cursor? I'd like to do a similar thing with sniping sections in my Halo demake for GBC.
This was originally created in gb studio 2.0 so it was done with timers in a point and click scene like you said. I think that there's better methods though. In GBS 3.1 there are for example big sprites. In this when the possum gets bigger I had to move a whole bunch of sprites at the same time and it was really hard to stop them from glitching out.