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HTML 

              
                <div class="container">
  <h1>Guess The Number!</h1>

  <p id="main"><em>Choose a number between 1 and 30</em></p>

  <form class="flex-form">
    <label for="num" class="form-el">Insert your number:</label>
    <input type="number" name="num" id="num" class="bigger-box" min="1" max="30" placeholder="Insert your number" required />
    <button type="submit" id="submit" class="btn bigger-box">Let's Play!</button>
    <button type="reset" id="reset" class="btn bigger-box">Play Again</button>
    <p id="show-num"></p>
    <p id="hint"></p>
    <p id="success"></p>
  </form>
</div>
!

CSS 

              
                @import url("https://fonts.googleapis.com/css2?family=Monoton&family=Roboto:ital,wght@0,700;1,400&display=swap");

:root {
  --heading: "Monoton", cursive;
  --smaller-font: "Roboto", sans-serif;

  --red: #dd2c00;
  --green: #76a21e;
  --yellow: #fcbf1e;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #1b1b2f;
  color: var(--yellow);
  font-family: var(--smaller-font);
  font-size: 1.5rem;
  margin: 0 auto;
  padding: 0 auto;
  max-width: 80%;
  height: 100%;
  text-align: center;
}

h1 {
  color: var(--red);
  font-family: var(--heading);
  font-weight: lighter;
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

#main,
label {
  font-size: 1.2rem;
}

label {
  margin-bottom: 1em;
}

.container {
  position: absolute;
  top: 10%;
  bottom: 40%;
  left: 0;
  right: 0;
  align-items: center;
  max-width: 100%;
}

.flex-form {
  position: absolute;
  left: 0;
  right: 0;
  top: 12em;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.bigger-box {
  background-color: #fdfdc4;
  font-family: var(--smaller-font);
  font-size: 1rem;
  width: 15rem;
  height: 3rem;
  margin-bottom: 2rem;
  text-align: center;
  border: none;
  border-radius: 10px;
  outline: none;
  max-width: 85vw;
}

#hint {
  font-size: 2rem;
  font-style: italic;
  position: absolute;
  top: 12rem;
}

.message {
  font-size: 2rem;
  font-weight: 700;
}

#success {
  font-size: 3.2rem;
  position: absolute;
  top: 8rem;
}

.bigger-font {
  color: #f4f6ff;
  font-size: 2em;
  text-shadow: 2.5px 2.5px 5px var(--green);
}

#show-num {
  color: var(--green);
  font-family: var(--heading);
  font-size: 13rem;
  opacity: 0.7;
  position: absolute;
  top: -7.5rem;
  z-index: -100;
}

.btn {
  background-color: var(--yellow);
  cursor: pointer;
  font-weight: 700;
}

.btn:hover {
  background-color: var(--red);
  color: #ffffff;
  font-weight: bold;
}

#reset {
  margin-top: 8rem;
}

@media all and (max-width: 718px) {
  h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
  }

  .container {
    top: 5%;
  }

  .flex-form {
    top: 20rem;
  }

  #hint {
    font-size: 1.5rem;
  }

  #success {
    font-size: 2rem;
    top: 6rem;
  }

  #show-num {
    font-size: 10.5rem;
    top: -8rem;
  }

  #reset {
    margin-top: 5rem;
  }
}
!

JS 

              
                document.addEventListener("DOMContentLoaded", () => {
  // grab elements & store in variable
  const main = document.querySelector("#main");
  const form = document.querySelector("form");
  const label = document.querySelector("label");
  const num = document.querySelector("#num");
  const success = document.querySelector("#success");
  const hint = document.querySelector("#hint");
  const showNum = document.querySelector("#show-num");
  const submit = document.querySelector("#submit");
  const reset = document.querySelector("#reset");

  //   initial setup
  
  let generateRandomNum = Math.floor(Math.random() * 30) + 1;
  console.log(`INIT: ${generateRandomNum}`);
  let tries = 1;
  // label.style.visibility = "visible";
  reset.style.visibility = "hidden";

  //   game start
  form.addEventListener("submit", (e) => {
    e.preventDefault();
    
    // get input value
    const getNum = e.target.num.value;

    // guessed number less than mystery number
    if (getNum < generateRandomNum) {
      tries++;
      // success.textContent = "";
      num.value = "";
      hint.textContent = "Oops... Maybe higher number?";
      submit.innerText = "Try Again";
      // guessed number greater than mystery number
    } else if (getNum > generateRandomNum) {
      tries++;
      // success.textContent = "";
      num.value = "";
      hint.textContent = "Hmmm... Let's try lower number";
      submit.innerText = "Try Again";
      // success guessed mystery number
    } else {
      main.innerHTML =
        '<span class="message">Yes! The mystery number is:</span>';
      success.innerHTML = `You got me after <span class="bigger-font">${tries}</span> times!`;
      hint.textContent = "";
      showNum.textContent = `${getNum}`;
      reset.style.visibility = "visible";
      label.style.visibility = "hidden";
      num.style.visibility = "hidden";
      submit.style.visibility = "hidden";
    }
    console.log(`TRY: ${tries}`);
  });

  //   reset game
  reset.addEventListener("click", (e) => {
    e.preventDefault();

    num.value = "";
    reset.style.visibility = "hidden";
    label.style.visibility = "visible";
    num.style.visibility = "visible";
    submit.style.visibility = "visible";
    success.textContent = "";
    showNum.textContent = "";
    submit.textContent = "Let's play!";
    main.textContent = "Choose a number between 1 and 30";

    generateRandomNum = Math.floor(Math.random() * 30) + 1;
    tries = 1;

    console.log(`from reset: ${generateRandomNum}`);
    console.log(`tries from reset: ${tries}`);
  });
});
!
999px

Console