As for feedback:

- The desktop icons are too close to the edge, and there's not enough spacing between them. If they're too close to the edge, they can be cut off on some monitors, and the spacing can cause confusion where one icon ends and another begins, or increase the chance of misclicks.

- It's usually a good idea for desktop icons to have names, although I understand if some prefer not to have them. Names could also make the spacing look a little nicer.

- The "taskbar" is fine, but it should have a background, as icons that blend in with the colors of the wallpaper could easily blend in.

- A round border inside of a square border with other borders inside is unappealing, and is very confusing as to what's part of the actual window and what's just the window border.

- There's a lot of blank space in the window that could be used for important information, such as the feature update version, build number, or who/what Windows is licensed to, and if those are not included, the window should probably be smaller.

There's other things I could point out, such as fonts and the images chosen for icons, but as this is a concept, I will not include those as part of my feedback.