Not too far in yet, but you've got me interested and it's obvious you put a lot of work into making it. Aesthetically, it's really well done.
My main complaints so far aren't too intense, but I do have a few:
1. If you're going to open a game up with a quote, it better be a damn good one. In the vast majority of cases where a visual work (game/film/ect.) opens with a quote it almost always comes across as tacky and leaves a bad immediate impression, especially if that quote is something you made up yourself (like this one appears to unfortunately be).
2a. Anyone saying "Oh, cool" would have been quite uncommon as it had only very recently entered into the counter-culture slang vernacular and hearing it said by any cop or detective would have been extremely unlikely.
2b. Besides that, saying "oh, cool" in any professional setting by a fresh hire torward any superior, especially upon first meeting them, would have been firmly looked down upon and viewed as disrespectful or give the impression that they were uneducated.
3. Nobody would have said "weird ass" in the 60's.