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Flappy bird
Developer User18896｜Date and time 24/2/28 1:05:45
Build time 19.276 sec｜Game capacity 2.926KB｜

Script

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

<!DOCTYPE html>
<html>
<head>
<title>Flappy Bird Game</title>
<style>
canvas {
    border: 1px solid black;
    display: block;
    margin: 0 auto;
}
</style>
</head>
<body>
<canvas id="canvas" width="480" height="320"></canvas>
<script>
let canvas, ctx;
let bird, pipes;
let gravity = 0.5;
let jump = -8;
let gap = 110;
let score = 0;

function Bird(x, y) {
    this.x = x;
    this.y = y;
    this.velocity = 0;

this.show = function() {
        ctx.fillStyle = 'yellow';
        ctx.fillRect(this.x, this.y, 30, 30);
    }

this.update = function() {
        this.velocity += gravity;
        this.velocity *= 0.9;
        this.y += this.velocity;

if (this.y >= canvas.height - 30) {
            this.y = canvas.height - 30;
            this.velocity = 0;
        }

if (this.y <= 0) {
            this.y = 0;
            this.velocity = 0;
        }
    }

this.flap = function() {
        this.velocity += jump;
    }
}

function Pipe() {
    this.top = Math.floor(Math.random() * (canvas.height - gap - 30));
    this.bottom = canvas.height - this.top - gap;
    this.x = canvas.width;
    this.w = 50;
    this.speed = 2;

this.show = function() {
        ctx.fillStyle = 'green';
        ctx.fillRect(this.x, 0, this.w, this.top);
        ctx.fillRect(this.x, canvas.height - this.bottom, this.w, this.bottom);
    }

this.update = function() {
        this.x -= this.speed;

if (this.x + this.w < 0) {
            this.x = canvas.width;
            this.top = Math.floor(Math.random() * (canvas.height - gap - 30));
            this.bottom = canvas.height - this.top - gap;
        }

if (bird.x + 30 > this.x && bird.x < this.x + this.w) {
            if (bird.y < this.top || bird.y + 30 > canvas.height - this.bottom) {
                alert('Game Over! Your score: ' + score);
                bird = new Bird(50, canvas.height / 2 - 15);
                pipes = [];
                score = 0;
            }
        }

if (bird.x > this.x && bird.x < this.x + this.w) {
            score++;
        }
    }
}

function setup() {
    canvas = document.getElementById('canvas');
    ctx = canvas.getContext('2d');

bird = new Bird(50, canvas.height / 2 - 15);
    pipes = [];

window.addEventListener('keydown', function(e) {
        if (e.keyCode === 32) {
            bird.flap();
        }
    });

window.setInterval(function() {
        bird.update();
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        bird.show();

if (pipes.length === 0 || pipes[pipes.length - 1].x < canvas.width - 150) {
            pipes.push(new Pipe());
        }

pipes.forEach(function(pipe) {
            pipe.update();
            pipe.show();
        });

ctx.fillStyle = 'black';
        ctx.font = '20px Arial';
        ctx.fillText('Score: ' + score, 10, 30);
    }, 1000 / 60);
}

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