Not sure how active/receptive to feedback the dev is on here, but this game is going to need to figure out if it wants the dating/sex to be 100% tied to the delivery system or totally disconnected.
Right now the game feels closer to a stalker simulator with the tracking and teleport system.
When it was set in a small town, it made sense that the sole delivery guy would be able to build these kind of relationships with people, but the change to a large city not only makes the deliveries harder to complete, it also makes the big empty world feel even more shallow with the MC somehow delivering the exact same orders to the exact same people.
I don't have much advice on how a 100% tied to delivery system would work, because to me it just is going to result in all the characters feeling the exact same. I can definitely understand the more outgoing personalities being eager to flirt and get to know the MC, but not every character is supposed to be like that. It feels like there has to be some other way to romance the others that exists outside of the system.
Even so, I think being able to do deliveries to non-modeled, generic NPCs that exist solely as orderers would help the world feel a bit less empty.
This is a very light worldbuilding complaint, but it's a bit weird how little the MCs human status, which is supposed to be the same as seeing a dragon flying IRL is actually referenced in the game at it's current state. You can freely take your mask off and no one seems to mind, nor do any of the characters bring it up, even during sex. Again, this is one of those details where you need to think how the different personalities will react to the information once they get it.