Hello and welcome to the forum !
It’s a good start, and the natural environment is already very cool !
The shape of the buildings is very interesting too !
Now what is kinda lacking to make it work better is a better sense of scale, and overall logic.
In pop culture a common waterfall is the width of a river.
Now since to us these blue shapes are unknown, our brain process the image to look for clues.
Because we lack human scale reference everything appears to be much smaller that you’d like them to be, since we fallback to that idea that a waterfall is smaller than here.
Pay also attention to the camera position, we are very high , probably as high as the little mountain next to the most right building. This also tends to makes things look smaller.
To make it work better, you need to add human sized elements, like trees, streets, cars, people, birds, boats, widows, stairs, elevators… only a few will already make a big difference.
Now if you really want to push it one big step further, adding elements of a functioning city will help a lot to sell the design.
How do we go from one building to the other ? How the city is structured ? by putting more logic and function we’ll relate much more to that as a city.
One simple way could be to have one main big building, and smaller ones that gravitates around.
And they are connected with some kind of smaller roads.
You can add some kind of a dam that use water flow to generate energy.
Another part could be more dedicated to food growth… with a shape a bit different than the rest. Make your own story like if you’re living here and follow that logic, we might not get what is what but it might feel much more organised and complex.
But of course this represents a bunch of work. You can probably manage to make something cool without all these details, but since you asked for feedback…
I hope this doesn’t sound too harsh !
At least, all the elements are there , but they can be organised better so it can work much better !
I’ve got a question about the rock texture that you’re using , is it something freely available somewhere ? I’m just working on environment right now and this one looks quite cool !