I like it! What I would have done differently: use the original colors, the deep blue color for the window decoration in Windows 98 is quite different from the color you are using. Also I would use a green wallpaper of a shade closer to the default on Windows 95/98, and an icon theme with beige and yellow icons.
I have actually been wanting to do something like this with the old Mac OS 7 “Platinum” theme, modernizing it for Xfce so it looks like the old Mac OS 7 in spirit, but not exactly like Mac OS 7 the way most immitation Platinum themes try to do.
I like it! What I would have done differently: use the original colors, the deep blue color for the window decoration in Windows 98 is quite different from the color you are using. Also I would use a green wallpaper of a shade closer to the default on Windows 95/98, and an icon theme with beige and yellow icons.
I have actually been wanting to do something like this with the old Mac OS 7 “Platinum” theme, modernizing it for Xfce so it looks like the old Mac OS 7 in spirit, but not exactly like Mac OS 7 the way most immitation Platinum themes try to do.