I can see that you are missing a few parts. And second there are a few mistakes. Especialy the graveyard area.
Did you take all screenshots in one session? It is important to do that, because if you have to go back for pickup shots, you will always have a difference in zoomlevel. I have done dozens already, and if you've missed a spot, it's very difficult to get a good allignement.
It's also best to start with a corner, and then stich onto that. Try to zoom in, to get the best possible fit.
First panorama I did, took more than two hours (had half the land at that time). Now with all the land purchased, all buildings and a lot of decorations, it takes me less than one hour.
Try and try again. Good luck.