Hello Kuba38CZ, yes, indeed! It is my objective to upgrade all the graphical aspect (textures, 3D models, audio, etc.), but all in due time!
When I first began this project, I wasn't really a 3D modeler, yet, there were no 3D models of what I needed, so I had to make them however I could.
Even though the models can be better, I'm sure, most of them already went through a revision and were upgraded by myself at a later time (you don't want to see the first, old models...)