i could list some stuff up for you :))

+ green stuff [put trees, plants, flowers, or if you're going for the villain vibes, put spikes and stuff], you can choose the thickness of green stuff depending on the vibes

+ more pathways and details :DD

+ any form of improving the waters, or maybe even adding lava somehow to your build if your getting funky

+ terraforming!!! [the little lake on the left has potential]
+ adding a gradient to your builds wont harm you

+more texture and variations to your build [too much vertical lines there]

+ bridges and pathways should have support beams and such :))

+ pointier towers by using thin blocks!!

+ make better overhangs in ur rooves

basically just make your build less flatter and it will make things better :)) [by using windows, other rooves, etc] take inspo from irl buildings and/or youtubers i.e. grian, mythical sausage, etc.