How to do this in unity?

Question

Unity

How to do the same as in the screenshot? In the sense that the map consists of squares, by clicking on certain ones, objects for purchase appear on the choice, which are placed in the place of this square. It's not done by hand, is it? I thought that tilemaps would help, but they say that they are more responsible for the exterior and that it does not fit here.

Answer 1

Here . The code is in lua, but the essence is the same.

Answer 2

You create a separate script, hang it on a dummy, when you press the left mouse button, you find out what you clicked on, if it is a cell on which you can build, you take its coordinates and put a tower on them (you refer to the tower selection component).
You can hang all this on the cursor, if it is a separate object, with its own sprite and collider.