If you are referring to how to change the icons, it is easy and depends on what perks you use, whether the default ones or the gympie ones, in the case of the gympie ones, you have to look for the .iwi files that are called "speciality_" and there you will see both the perks and the powerups, well what you have to do in the asset manager is create an .iwi with these "2D" options, instead of replacing you change to "blender" and then choose the image. what you want to put in it, what if the image has to be considered with the same resolution of the .iwi that you want to replace. For that, I advise you to look for the ".iwi extractor" that will help you extract it, as soon as you change the size, I advise you to look for an application that does it, or the net pain which is the one I use, if you have problems, talk to me and I will tell you I do them for free, no problem. If you do, remember to replace the new one you created with the one you want to change.