“Fluxus” is followed by a colon and – on the next line – a progression of different Cold K ghosts. The last of the Cold Ks is a question mark. One (overly-?)close reading of the sticker might be that it’s saying that the progress of Cold K is fluxus.
There’s a cartoon character standing on the first Cold K. He might be part of the flow of ghosts. Or he may be the sticker artist standing on a Cold K soapbox and saying, “This is fluxus.” If he represents the latter, is he in on BOTW, or is he an outside observer and commentator?