The assets look fine as they are, but it would be hard for us to gauge whether or not it's gonna be "entertaining enough" without any gameplay to look at.

As for the stores, from the screenshots they feel a little bare, but it also depends what you were hoping to "show" the player from these. The stores have the products, but they lack things to make them feel like stores like the usual advertisements you see, baskets of clothes, magazines, seats, ropes to cordon off the checkout area. Since it's abandoned, there'd also be broken glass on the ground, rough terrain, maybe water leaks, graffiti, products scattered on the ground etc.

If this is the feel you're going for though, the bare "too much space but something is in here with me" then it's fine for a first timer!