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No:52406

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Shooting Game
Developer User21925｜Date and time 24/3/22 4:52:44
Build time 11.08 sec｜Game capacity 3.015KB｜

Script

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[PR]現在の本の売れ筋ランキング

Click here for free DL of the app version that can save data.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Shooting Game</title>
<style>
    body {
        text-align: center;
    }
    canvas {
        border: 1px solid black;
    }
</style>
</head>
<body>
<canvas id="gameCanvas" width="400" height="400"></canvas>
<script>
    const canvas = document.getElementById('gameCanvas');
    const context = canvas.getContext('2d');

let score = 0;
    let isGameOver = false;

const player = {
        x: canvas.width / 2,
        y: canvas.height - 50,
        width: 20,
        height: 20,
        color: 'blue',
        speed: 5
    };

const bullets = [];
    const enemies = [];

function drawPlayer() {
        context.fillStyle = player.color;
        context.fillRect(player.x, player.y, player.width, player.height);
    }

function drawBullets() {
        bullets.forEach(bullet => {
            context.fillStyle = 'black';
            context.fillRect(bullet.x, bullet.y, 5, 5);
        });
    }

function drawEnemies() {
        enemies.forEach(enemy => {
            context.fillStyle = 'red';
            context.fillRect(enemy.x, enemy.y, 20, 20);
        });
    }

function updateGame() {
        if (isGameOver) {
            return;
        }

context.clearRect(0, 0, canvas.width, canvas.height);

drawPlayer();
        drawBullets();
        drawEnemies();

bullets.forEach(bullet => {
            bullet.y -= 5;
        });

enemies.forEach(enemy => {
            enemy.y += 2;
            if (enemy.y > canvas.height) {
                isGameOver = true;
            }
        });

bullets.forEach(bullet => {
            enemies.forEach(enemy => {
                if (bullet.x < enemy.x + 20 && bullet.x + 5 > enemy.x && bullet.y < enemy.y + 20 && bullet.y + 5 > enemy.y) {
                    score++;
                    enemies.splice(enemies.indexOf(enemy), 1);
                    bullets.splice(bullets.indexOf(bullet), 1);
                }
            });
        });

enemies.forEach(enemy => {
            if (enemy.x < player.x + player.width && enemy.x + 20 > player.x && enemy.y < player.y + player.height && enemy.y + 20 > player.y) {
                isGameOver = true;
            }
        });

if (Math.random() < 0.02) {
            enemies.push({
                x: Math.random() * (canvas.width - 20),
                y: 0
            });
        }

requestAnimationFrame(updateGame);
    }

updateGame();
</script>
</body>
</html>