Thanks for playing!
It's actually the other way around when I was writing the story. The dog is in the afterlife (hinted by the looping ending and there's not a single human in the world). So basically the dog is waiting for Dum Dum to come to heaven. But your interpretation is also not entirely wrong because that was exactly how I felt when editing the story. I felt it would be nice to leave the Dum Dum's/crow's identity up to people's imagination. <3