Enha: mime move check; start game backlog msg

handlers/elements.go

@@ -41,7 +41,7 @@ func HandleShowColor(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if fi.State.Role != "guesser" {
-		err = errors.New("need to guesser to open the card")
+		err = errors.New("need to be guesser to open the card")
 		abortWithError(w, err.Error())
 		return
 	}