A very sad and a touching game. It's only a game that someone who's had pets could really understand on that deep emotional level. Huge props for using photos of your cats too, made it hit all the harder.
There's something about the afterlife that is uniquely intriguing not only from a narrative perspective but deep 'what is the meaning of life' type stuff. If you're into that I strongly recommend a book called 'The Case for Heaven' by Lee Strobel.
Overall amazing game!