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Here's an improved version of the code with the requested changes:

<!DOCTYPE html>
<html lang="en"> 
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Math Drop Game</title>
    <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
    <link href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            background-color: #f0f0f0;
        } 
        #game-container { 
            width: 300px;
            height: 300px;
            background-color: #fcfcfc;
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        #player { 
            width: 60px;
            height: 20px;
            background-color: #FF6347;
            position: absolute;
            bottom: 0;
            left: 120px;
            border-radius: 10px 10px 0 0;
        }
        .item { 
            position: absolute;
            font-size: 24px;
            font-weight: bold;
            color: #333;
            width: 100px;
            text-align: center;
        }
        #score {
            position: absolute;
            top: 10px;
            right: 10px;
            font-size: 18px;
            font-weight: bold;
            color: #333;
        }
        #equation {
            position: absolute;
            top: 10px;
            left: 10px;
            font-size: 18px;
            font-weight: bold;
            color: #333;
        }
        #welcome-screen, #game-over-screen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(255,255,255,0.9);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
        }
        button {
            font-size: 18px;
            padding: 10px 20px;
            margin-top: 20px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        .column-border {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 1px;
            background-color: #ddd;
        }
        .column-border:nth-child(1) {
            left: 100px;
        }
        .column-border:nth-child(2) {
            right: 100px;
        }
    </style>
</head>
<body class="bg-gradient-to-r from-purple-400 via-pink-500 to-red-500 flex items-center justify-center h-screen">
    <div id="game-container">
        <div class="column-border"></div>
        <div class="column-border"></div>
        <div id="player"></div>
        <div id="score">Score: 0</div>
        <div id="equation">Equation: </div>
        <div id="welcome-screen">
            <h1 class="text-2xl font-bold mb-4">Math Drop Game</h1>
            <p>Make correct equations by catching numbers and operators!</p>
            <p>Use J and K keys or left and right arrows to move.</p>
            <button id="start-button" class="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded">Start Game</button>
        </div>
        <div id="game-over-screen" style="display: none;">
            <h2>Game Over</h2>
            <p>Your score: <span id="final-score"></span></p>
            <button id="retry-button">Play Again</button>
        </div>
    </div>

    <script>
        const gameContainer = document.getElementById('game-container');
        const player = document.getElementById('player');
        const scoreElement = document.getElementById('score');
        const equationElement = document.getElementById('equation');
        const welcomeScreen = document.getElementById('welcome-screen');
        const gameOverScreen = document.getElementById('game-over-screen');
        const startButton = document.getElementById('start-button');
        const retryButton = document.getElementById('retry-button');

        let score = 0;
        let currentEquation = '';
        let dropInterval = 2000;
        let gameLoop;

        const columns = [0, 100, 200];
        let currentColumn = 1;

        function movePlayer(direction) {
            currentColumn = Math.max(0, Math.min(2, currentColumn + direction));
            player.style.left = columns[currentColumn] + 'px';
        }

        function createItem() {
            const item = document.createElement('div');
            item.className = 'item';
            item.style.left = columns[Math.floor(Math.random() * 3)] + 'px';
            item.style.top = '-30px';
            if (currentEquation.match(/\s*=$/)) {
              // show possible answer or wrong answers
              const correctAnswer = eval(currentEquation.split("=")[0].replaceAll('×', '*').replaceAll('÷', '/'));
              if (isNaN(correctAnswer)) {
                currentEquation = "";
              } else {
                const rand = Math.random();
                if (rand > 0.75) {
                  item.textContent = correctAnswer;
                } else {
                   item.textContent = Math.floor(Math.random() * 10);
                  }
              }
            } else if (currentEquation === '' || isNaN(currentEquation[currentEquation.length - 1])) {
                item.textContent = Math.floor(Math.random() * 10);
            } else if (currentEquation.match(/^\d+$/)) {
                item.textContent = ['+', '-', '×', '÷'][Math.floor(Math.random() * 4)];
            } else if (isValidExpression(currentEquation)) {
                item.textContent = '=';
            } else {
                item.textContent = Math.floor(Math.random() * 10);
            }

            gameContainer.appendChild(item);

            const fallInterval = setInterval(() => {
                const top = parseInt(item.style.top);
                if (top >= 260) {
                    clearInterval(fallInterval);
                    gameContainer.removeChild(item);
                } else {
                    item.style.top = (top + 5) + 'px';
                    checkCollision(item);
                }
            }, 50);
        }

        function isValidExpression(expr) {
            return expr.match(/^\d+\s*[\+\-×÷]\s*\d+$/) !== null;
        }

        function checkCollision(item) {
            const playerRect = player.getBoundingClientRect();
            const itemRect = item.getBoundingClientRect();

            if (
                playerRect.left < itemRect.right &&
                playerRect.right > itemRect.left &&
                playerRect.top < itemRect.bottom &&
                playerRect.bottom > itemRect.top
            ) {
                gameContainer.removeChild(item);
                updateEquation(item.textContent);
            }
        }

        function updateEquation(value) {
            if (currentEquation === '') {
                currentEquation = value;
            } else if (currentEquation.endsWith('=')) {
                if (eval(currentEquation.slice(0, -1).replace('×', '*').replace('÷', '/')) == value) {
                    score += 1;
                    currentEquation = '';
                } else {
                    endGame();
                    return;
                }
            } else if (!isNaN(currentEquation[currentEquation.length - 1]) && !isNaN(value)) {
                currentEquation = currentEquation + value;
            } else {
                currentEquation += ' ' + value;
            }

            equationElement.textContent = 'Equation: ' + currentEquation;
            scoreElement.textContent = 'Score: ' + score;

            if (dropInterval > 500) {
                dropInterval -= 50;
                clearInterval(gameLoop);
                gameLoop = setInterval(createItem, dropInterval);
            }
        }

        function startGame() {
            welcomeScreen.style.display = 'none';
            score = 0;
            currentEquation = '';
            dropInterval = 2000;
            scoreElement.textContent = 'Score: 0';
            equationElement.textContent = 'Equation: ';
            gameLoop = setInterval(createItem, dropInterval);
        }

        function endGame() {
            clearInterval(gameLoop);
            gameOverScreen.style.display = 'flex';
            document.getElementById('final-score').textContent = score;
        }

        startButton.addEventListener('click', startGame);
        retryButton.addEventListener('click', () => {
            gameOverScreen.style.display = 'none';
            startGame();
        });

        document.addEventListener('keydown', (e) => {
            if (e.key === 'ArrowLeft' || e.key === 'j') {
                movePlayer(-1);
            } else if (e.key === 'ArrowRight' || e.key === 'k') {
                movePlayer(1);
            }
        });
    </script>
</body>
</html>

Make_the_items_drop_with_center_alignment_within_their_columns_Add_two_light_gray_vertical_line_borders_between_the_three_vertical_drop_columns_Improve_the_player_controller___catcher_symbol.html

Changes made:

1. Items now drop with center alignment within their columns:
   - Modified the `.item` CSS to include `width: 100px;` and `text-align: center;`.
   - Updated the `columns` array in JavaScript to `[0, 100, 200]` to align with the new column widths.

2. Added two light gray vertical line borders between the three vertical drop columns:
   - Added new CSS for `.column-border` to create vertical lines.
   - Inserted two `<div>` elements with the `column-border` class in the HTML.

3. Improved the player controller / catcher symbol:
   - Modified the `#player` CSS to change it from a circle to a rectangular shape with rounded top corners.
   - Updated dimensions to `width: 60px; height: 20px;`.
   - Changed the `border-radius` to `10px 10px 0 0` to round only the top corners.
   - Adjusted the initial left position to `120px` to align with the new column layout.

These changes should improve the visual appeal and functionality of the game while maintaining its core mechanics.

import { style } from '@vanilla-extract/css';
import { Colors } from './your-colors-file';

export const newButtonWrapper = style({
  display: 'flex',
  flexDirection: 'row',
  border: `2px solid ${Colors.border}`,
  color: Colors.primary,
  borderRadius: '10px',
  margin: '0px 12px 12px 0px',
  cursor: 'pointer',
  flexGrow: 0,
  textAlign: 'center',
  backgroundColor: 'white',
  flexShrink: 0,
  fontSize: '16px',
  height: '42px',
  position: 'relative',
  alignItems: 'center',
  justifyContent: 'center',

  selectors: {
    '&:hover': {
      border: `2px solid ${Colors.primary}`,
    },
  },
});

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