Create a game of an alien trying to k○ll you's game

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No:11890

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Create a game of an alien trying to k○ll you
Developer User4972｜Date and time 23/8/13 0:42:41
Build time 17.549 sec｜Game capacity 1.852KB｜

Script

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<!DOCTYPE html>
<html>
<head>
  <title>Jogo do Alien</title>
</head>
<body>
  <canvas id="gameCanvas" width="400" height="400"></canvas>

// Função para desenhar os elementos do jogo
    function draw() {
      // Limpa o canvas
      canvasContext.clearRect(0, 0, canvas.width, canvas.height);

// Desenha o alien
      canvasContext.fillStyle = "#33cc33";
      canvasContext.beginPath();
      canvasContext.arc(alienX, alienY, 20, 0, Math.PI*2, true);
      canvasContext.fill();

// Verifica se o alien te alcançou
      if (Math.abs(alienX - canvas.width/2) < 20 && Math.abs(alienY - canvas.height/2) < 20) {
        gameOver = true;
      }

// Move o alien
      alienX += alienSpeedX;
      alienY += alienSpeedY;

// Inverte a direção do alien se ele atingir uma borda do canvas
      if (alienX < 20 || alienX > canvas.width - 20) {
        alienSpeedX *= -1;
      }
      if (alienY < 20 || alienY > canvas.height - 20) {
        alienSpeedY *= -1;
      }

// Encerra o jogo se o alien te alcançou
      if (gameOver) {
        canvasContext.font = "30px Arial";
        canvasContext.fillStyle = "red";
        canvasContext.fillText("Game Over!", canvas.width/2 - 80, canvas.height/2);
        return;
      }

// Chama a função de desenho novamente
      requestAnimationFrame(draw);
    }

// Função para iniciar o jogo
    function startGame() {
      canvas = document.getElementById("gameCanvas");
      canvasContext = canvas.getContext("2d");
      draw();
    }

// Inicia o jogo quando a página estiver carregada
    window.onload = startGame;
  </script>
</body>
</html>