Siren,
I've requested this before and this is how you could improve your game.
You could add dialogue to things like pictures on the walls (and maybe image display), store signs saying the store name, toilets (ie. MC could comment "looks dirty" or even taking a pee randomly or pull some dirty item from the bowl), play with slot machines, examine magazine rack and notice porn mags on it, you get the point.
And maybe some secrets that if you interact with certain places you could unlock something (scenes, hidden rooms, items.
And also, could we pick up those flowers in the park and give them as a gift or simply cheer someone up.