!!SPOILERS!!
Man, this was wack. I may play it again a few times to try to analyse what happened. It seems like pink dude has pretty serious depression--or schizophrenia. Judging by the lack of conversation in the last "chat with your friends" part, either the friend ended themself or pink dude has been distancing himself. Pink dude has a number of strange visions, possibly hallucinations, leading it down the schizo path. However, this could also be looked at in a drastically different way: an apocalypse has come upon the world, and pink dude is trying to ignore everything happening. The friend was taken by the apocalypse, and by the end, pink dude was taken too. Overall, this game was beautiful, from the art style to the googly eyes to the wack story. Beautiful job, creator.