Would love for you to do some tutorials on how you make these psuedo 3d games with 2d in Unity!
If you want to make something that looks like this, all you really need to do is look up how to do billboarding in Unity to have sprites always face a camera
From there, you just have to treat every object as if it were a normal 3D object
So the game sprites are billboards but how is the other objects? 3d sprites on a plane?
All of the other objects are either 2D sprites, or they're stacks of sprites which are made to look 3D