Agree with shutterbug on the need for more headroom for the top block and I also think the black background takes away from the picture. I think also the shadow of the top block across the “are” block is distracting too.
A great effort I think though, but I’d like to see another effort, perhaps bringing out more texture on the first two blocks.
Agree about the crop. Could even try to take the shot from lower down to give the impression the blocks are huge. Also, maybe put blocks are more varying angles to create different shades per block..(make sense?)