This is really impressive for a first game - well done! I really like the direction you took with the writing - it has a sort of nonchalant melancholy tone which feels quite different. The minimalist art style and sound effects also complement the writing nicely - it gives it a bit of a film noir feel :)
I have got 2 of the endings so far, and didn't see the twist of one of them coming! I'm going to try playing through some more to see if I can get the other endings :)