app components howto: clarify that you need to be on a voice call

app/components/how-to-play.tsx

@@ -2,25 +2,29 @@ export default function HowToPlay() {
   return (
     <div className="mb-4 rounded-md bg-yellow-100 p-3 shadow-md">
       <p className="mb-2 font-handwriting text-3xl font-black text-yellow-900">
-        how to play
+        How to Play
       </p>
       <ul className="text-sm leading-relaxed text-yellow-700">
         <li>
-          <span className="text-lg">💁</span> Choose the clue when you have
+          <span className="text-lg">🎧</span> Join a voice call together
+        </li>
+        <li>
+          <span className="text-lg">👉</span> Choose the clue when you have
           board control
         </li>
         <li>
-          <span className="text-lg">⏱️</span> Wait for the clue to be read
+          <span className="text-lg">👀</span> Wait until the buzzer opens
         </li>
         <li>
           <span className="text-lg">🚨</span> Buzz in when you know the answer
         </li>
         <li>
-          <span className="text-lg">🗣️</span> Guess out loud (no need to type)
+          <span className="text-lg">🗣️</span> Fastest buzzer guesses out loud on
+          the call
         </li>
         <li>
-          <span className="text-lg">🙊</span> Check the correct answer privately
-          (don't say it!)
+          <span className="text-lg">🙊</span> Fastest buzzer checks the correct
+          answer privately (don't say it!)
         </li>
         <li>
           <span className="text-lg">⚡</span> Swoop in when others are wrong