JavaScript game with css generated blocks, character failing to jump onclick

I have the following game and the css green block is failing to jump on click. I can’t seem to spot my error.

As you can see I have added the onclick event in the HTML and as far as I know the css animation is correctly coded in the style file. I want the character to jump calling the CSS animation, and ideally avoid a JScript function at this stage (or have both alternatives to see which is simpler for young students)

Can anyone spot and point out the error please.

* {
  padding: 0;
  margin: 22;
}

#game {
  width: 500px;
  height: 500px;
  border: 4px solid #f74cbc
}

#character {
  width: 30px;
  height: 120px;
  background-color: green;
  position: relative;
  top: 380px;
  border-radius: 20px;
  animation: jump 500ms;
}

#enemy {
  width: 60px;
  height: 60px;
  background-color: red;
  border-radius: 10px;
  position: relative;
  top: 320px;
  left: 440px;
  animation: moveenemy 1s infinite linear;
}

@keyframes jump {
  0% {
    top: 380px;
  }
  30% {
    top: 200px;
  }
  50% {
    top: 200px;
  }
  100% {
    top: 380px;
  }
}

@keyframes moveenemy {
  0% {
    top: 440px;
  }
  50% {
    top: 58px;
  }
  100% {
    left: 0px;
    top: 320px;
  }
}
<!DOCTYPE html>
<html lang="en" onclick="jump()">
<head>
  <meta charset="UTF-8">
  <title>Battle</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <h1>TG</h1>
  <p>Avoid the red</p>

  <div id="game">
    <div id="character"></div>
    <div id="enemy"></div>
  </div>
  <script src="script.js"></script>
</body>
</html>

Update:

I know I could use a Jscript function like the below, but even that does not work?

JavaScript tried below (in the script.js)

function jump(){
    if(character.classlist!="animate"){
    character.classList.add("animate");
    }
    setTimeout(function(){
        character.classList.remove("animate");
    },500);
    
}

Ideally, as mentioned, I want the simplest possible solution. Could both errors be pointed out (solution provided) so both alternatives are present in the answer. Which is the recommended way?

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