Icons are nice. Letters are not so.
KO is practically unreadable, especially on preview: O is obscured by cross; between arm and leg of a K there is dark color which makes them hard to separate, so it posible to read it as H.
V in VS looks too much like U.
All this can be fixed if you'll note which details make letters look similar and which make them distinctly different. V, for example, has corner in it which U hasn't.
Yes, that's what I meant.