Nice, the core mechanic is pretty similar to 2048 but works well! The music and graphics fit nicely together and make the game feel pretty relaxing.
Mechanics-wise I thought it was neat that you can actually shuffle single buildings around by just dragging them into an open space which is different from 2048. And the way you select things made me think initially there would be a bit of match 3 style thing where I could make longer chains for bonuses. I think that might be an interesting direction to explore.
One more interesting direction I could see this going is to explore ideas of overpopulation or underpopulation. For example, maybe if a building is surrounded on all 4 sides, a timer starts ticking down and makes the building shrink one stage because of overpopulation making people want to move out. I think it would be really neat if the optimal gameplay then ended requiring you to make small clusters around the map so that there end up being different "neighborhoods" to your city.