I have mixed feelings about something like this, but only because I played KSP before there were any saves or even persistence, and when the only destination was the Mun. Getting to the Mun and back was hard, because you could not make mistakes, you could not misstep, it was all or nothing and it was tremendous fun, as well as nerve wracking. It's different now we have more planets of course, but still, a Mun flight can be done without saves, and it's a lot of fun doing it that way when there's the risk that it can all go wrong.