When the wire length is increased, resistance also increases.
Resistivity is one of the factors that affects an object's overall resistance, but the dimensions of the object also play a role. The resistance of a wire in particular is greatly affected by its length and diameter. Increasing the length of a wire increases its resistance because the electrons will experience more collisions as they flow from one end to the other. Back at the mall, if I had to walk a longer distance between stores, I'd inevitably run into more of those people that were just standing around, and I'd lose more energy along the way.
On the other hand, the resistance of a wire decreases as its diameter gets larger because the electrons have more cross-sectional area to move through, which decreases the chance of collisions. If the mall were renovated to make it wider, then the people could spread out a bit more, which would give me more room to maneuver around instead of bumping into them.
