First off for the lights on the beach you might give it a haze effect by using setzoomeffect number; example setzoomeffect 9; Also depending on how that looks lightening or darkening.
My second thing is there are a few spots on the sand where there are big patches of the same tile you might try filling it in a little bit with other tiles so it doesnt look like a big empty patch.
Everything else I think has been pointed out.
addon second house looks much nicer. Might consider a chimeny with smokani.mng or smokeani.gif and use seteffect to make it lighter and look like smoke