Hey there. Tis Dutty, Ima be bossing this review for you right now.

Terrain:
As far as your terrain goes, you don't have any; the entire plot ground is flat give or take a couple small water features. However I can see that you have attempted to add some detailing to the terrain by using various block types as paths and an occasional patch of wheat. As well, I see some groups of flowers spread across the plot and as nice of an idea as this is, it's just not properly executed. I think terrain is commonly overlooked, and it's easiest in my opinion to build some levels of terrain first, even if its simple terrain like this:
https://imgur.com/k3GGtk2 - you can manipulate this simple terrain in many ways (water, paths, trees etc)
Or you can go more adventurous and potentially build cliffs/mountains, although mountains are not advised on a spark plot :p
That way, you can add to the terrain in any way you'd like. And adding structures will look nicer because they will be better placed.

Organics:
You have a small amount of organics in the trees. But two of them are spawned in, and we do not accept spawned in trees. As well as that, your trees are far too symmetrical to represent real trees. As a suggestion, even though all trees don't need to be exactly like his, try visiting this guys YouTube channel (https://www.youtube.com/channel/UCLUKySjsOfU9jcjYyFJWk2A) and see if you can get some inspiration from him. He's well known for making brilliant trees :3

Structure:
From what I can tell, each section of your plot is divided into four, each with a different theme. As much of an original and creative idea as this is, it's not without its improvement. Each structure is compact and exactly the same as the next one, just a different block is used. Not only do they lack in design diversity, but they also lack in detail. You haven't given the structures much to work with, so detailing is difficult. I would suggest making a larger structure, one or two, and giving yourself some space to actually detail and add depth. A nice roof is also preferred :3 And it might help you to stick to one theme, just an idea.

Good luck!

Dutty <3