They raised a buttload of money and added some background animated art, some more ships, UI tweaks but I don't understand where all the money went
That's a fair question to ask. I wish more KS (there have been a few) would outline where the various costs went to, to backers.
Not that I'm thinking these guys did anything dishonest (I have no reason to think that), but it does make you wonder.
edit: If nothing else, it might be a good eye opener for folks to see how the sausage is made, to quote Tim Schafer.