The game should by default auto save every 10 minutes, I believe. Your auto save would just be a little set back but it should be your latest play through. Hope that makes sense!
I really should give a review already: This is the best game I've seen in this category. There's a story, it's not super cheesy, and I like both the main two girls as well as the cafe. Other games have something broken about them or some such that I can't turn off certain things that don't interest me. You and the team thought of everything, so I feel at peace playing Project Reality. Can't wait to see what the update brings!