The theme song you chose is very emotional and fitting.
I would have liked to see more levels and photos of Snake. He seems like a cool cat, I'm sure we would have been best friends. My heart goes out to every cat owner who has to go through such a difficult situation.
I hope this is interesting instead of just offtopic and I apologize in advance, but in Bobo The Cat there was originally a snake too. As an Easteregg under a cardboard box before the first stealth section. I guess you get the joke. I deleted it though so as not to distract the players.