I downloaded the trippy app icons to files, but once the file was unzipped, every icon was blurry. This happened with the other app icons too, but not the widgets or wallpapers.
Hi, icons in Files look blurry because they are small, 180x180 pixels. This is done in order to reduce their size as much as possible so that they use less memory of your device.
But this size is enough to use them as app icons on any mobile device. And they will look nice.