I believe I can fly

<!DOCTYPE html> <html lang="pt-br"> <head> <meta charset="UTF-8"> <title>Jogo de Tênis Clássico</title> <style> body { background-color: #111; color: #fff; text-align: center; font-family: sans-serif; margin: 0; padding: 20px; } canvas { background-color: #2e7d32; /* Quadra verde */ border: 4px solid #fff; display: block; margin: 20px auto; } </style> </head> <body> <h1>Tênis Clássico (Pong)</h1> <p>Use as setas <strong>CIMA</strong> e <strong>BAIXO</strong> do teclado para mover sua raquete.</p> <canvas id="gameCanvas" width="800" height="500"></canvas> <script> const canvas = document.getElementById("gameCanvas"); const ctx = canvas.getContext("2d"); // Posição das Raquetes let playerY = 200; let cpuY = 200; const paddleWidth = 12; const paddleH