[SOME SPOILERS ON THE ENDING, READ AT YOUR OWN RISK]
although, I've heard a theory on the ending that made me replay the game to check some things out; Any thoughts on this?
During the end when Dr. Eva Rosalene and Dr. Neil Watts(main characters, girl and the fella with the glasses) are staring at the fireworks there are two Neils seen. While it could be a bug,
perhaps it signifies that Dr. Neil is using the memory machine (on his deathbed) to revisit the memory of Dr.Eva and himself fulfilling the man's wish, basically what's seen in gameplay,so near the end scene is him watching his memories, hence the two Neil's I mentioned earlier.
From what I recall when the dying man was..um...dying there would be a red pulse, which is the heart monitor machine ceasing. During the end scene after the fireworks the old man, Dr.Eva, Dr.Neil, and River are on a rocket ship heading off into space, which was the old man's altered memory and fulfilled wish. I think after a bit of dialog the old man disappears, right? So then why is there still a red pulse? There isn't much evidence to support this, just a quick little thought processed after playing the game and reading some forums.
Guess To The Moon was just so tear-jerking I Couldn't stop thinking about the game, loved it! and I love the thought put into the dedicated review/recommendation you did, Sloth.
Sorry about my grammar, I'm not the best at these kind of things