This is quite an impressive (incomplete) game! The story is heartbreaking, and I think the whole experience is simply amazing.
On the down side, as you have mentioned, it's clearly incomplete, so it doesn't make too much sense as a whole game experience. I trust you'll finish it!
As a suggestion: I'm thinking that in the finished product, the player should play the scenarios from last to first. For this example, let's suppose only the scenes 3, 4 and 5 exist. If you solve the first scenario first (so the girl never leaves), the rest of the story wouldn't make sense anymore. However, if you solve the last one first and save the guy, there's STILL the problem that he was driving while drunk, and that he destroyed his own home with his rage, so you need to go further into the past to fix the problem from it's root. I think the impact would be bigger that way. I'm not sure if I have explained myself correctly.