Well i made it to 50 days :D. Started taking chances and getting a crew half way through, but found them more hassle by the end :P. Think more "reward" needed for their darn food consumption :).
Have you ever played a game called Pardus? It's a web browser space game. If you're after some inspiration for furthering this game, i can highly recommend it.
Great work on bringing this together, well done!.