bug fix where new username cannot be fully entered

src/tictactoe/Player.tsx

@@ -22,6 +22,7 @@ export default function Player({
   );
   const [selectedMode, setSelectedMode] = useState("classic");
   const [isQueueing, setIsQueueing] = useState(false);
+  const isRegistered = localStorage.getItem("registered") === "yes";
 
   // ------------------------------------------
   // CONNECT
@@ -86,7 +87,7 @@ export default function Player({
             <input
               placeholder="Enter username"
               value={username}
-              disabled={username.length > 0}
+              disabled={isRegistered}
               onChange={(e) => setUsername(e.target.value)}
               style={{
                 padding: "10px",