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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <canvas id="gameCanvas"  />

            
          
!

CSS

            
              html, body{
  margin : 0px;
  width : 100%;
  height : 100%;
  overflow: hidden;
}

#gameCanvas{
  position: absolute;
}
            
          
!

JS

            
              var readyStateCheckInterval = setInterval( function() {
    if (document.readyState === "complete") {
        clearInterval(readyStateCheckInterval);
        initGame();
    }
}, 10);


var bgLoc = {x:0, y:0, width:32, height:32};
var groundLoc = {x:0, y:31, width:35, height:1};
var instructionsLoc = {x:6, y:49, width:17, height:21};
var gameOverLoc = {x:6, y:32, width:21, height:17};
var birdLocs = [{x:6, y:70, width:5, height:3}, {x:11, y:70, width:5, height:3}, {x:16, y:70, width:5, height:3}];
var tubeLoc = {x:0, y:32, width:6, height:44};
var scoreLocs = [
    {x:32, y:68, width:5, height:9},
    {x:27, y:32, width:5, height:9},
    {x:32, y:32, width:5, height:9},
    {x:27, y:41, width:5, height:9},
    {x:32, y:41, width:5, height:9},
    {x:27, y:50, width:5, height:9},
    {x:32, y:50, width:5, height:9},
    {x:27, y:59, width:5, height:9},
    {x:32, y:59, width:5, height:9},
    {x:27, y:68, width:5, height:9}
];

var flappyBirdSource = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACUAAABNCAYAAAAhOa00AAACFElEQVRoge2YO27DMAyGdZWga86RMWOQk3Tplq3IHXKYAB2LHKDt0gAd3DME6tDYlaWfD8mynQY0QMgWZfLjT9l5uKeXVz+nOXQYlEEZlEEZlEEZlEEZlEEZ1G1CNZe3zuIbQ592jdYPoVDCKQ1CPX/t/ZxmUAZlUAYlQT0el/7QbP2n3/spzw/NNvElYK1js1uETp9h0nrkp+7hocKDug4DUuvieGiuNy9BUUnjJBxsqEoMBeeHQnFjkBzFLIdCCmjGKDkJVdy+0lELFSpWBIWUi1sAE6VtotfWaB+CAi1E81ntQ++PqYyG0qgU+yklqkJpRpScO6egVe0bA4rzV4OiVJgVCiWSFOSKyYaS2gIrJjYzq95mt/Ax1BVMbEXsp6CE9rlkHQdVwRKlYKtSePYoBcmJh3x8ENQi7rpSkXIQtKeEfaQusqCwv0A1oVykDJi7E6ghe2rS9imrhOpkqt0PJFhWrKFQrr1hQNvIOANiVauupuq/Ae8WStU+5gNZhCrZU3FRZIEj/pphFSuCQk9cXG3sV6onqy5980SSowoz9tkwpW4SCt08BlTV9oXBYHACSjAVVE85hUIUlP6pVbwScgKKbUPbQtW+03HpW/u+fHSJtHMcVDgSc/T/U22y83rlz+uVD0HbObRuVCjnnHvfPSRJwrnT9U95tI6CQu3Lgqp8wCd5bqgO7l9AKd9v40Jx9gPPtP268oor4QAAAABJRU5ErkJggg==";
var spriteSheetImage = new Image();
spriteSheetImage.src = flappyBirdSource;
var spriteSheetCanvas = document.createElement("canvas");
spriteSheetCanvas.width = spriteSheetImage.width;
spriteSheetCanvas.height = spriteSheetImage.height;
var spriteSheetContext = spriteSheetCanvas.getContext("2d");
spriteSheetContext.drawImage(spriteSheetImage, 0, 0);

var renderCanvas = document.createElement("canvas");
renderCanvas.width = renderCanvas.height = 32;
var renderContext = renderCanvas.getContext("2d");
renderContext.globalCompositeOperation = "destination-over";
var collisionCanvas = document.createElement("canvas");

function drawSpriteSheetImage(context, locRect, x, y){
    context.drawImage(spriteSheetImage, locRect.x, locRect.y, locRect.width, locRect.height, x, y, locRect.width, locRect.height);
}

var canvas, context, gameState, score, groundX = 0, birdY, birdYSpeed, birdX = 5, birdFrame = 0, activeTube, tubes = [], collisionContext, scale;
var HOME = 0, GAME = 1, GAME_OVER = 2;

function initGame(){
    canvas = document.getElementById("gameCanvas");
    context = canvas.getContext("2d");
    scale = Math.floor(Math.min(window.innerHeight, window.innerWidth) / 32);
    canvas.width = scale * 32;
    canvas.height = scale * 32;
    canvas.style.left = window.innerWidth / 2 - (scale * 32) / 2 + "px";
    canvas.style.top = window.innerHeight / 2 - (scale * 32) / 2 + "px";
    window.addEventListener( "keydown", handleUserInteraction, false );
    canvas.addEventListener('touchstart', handleUserInteraction, false);
    canvas.addEventListener('mousedown', handleUserInteraction, false);
    collisionCanvas.width = birdX + 8;
    collisionCanvas.height = 32;
    collisionContext = collisionCanvas.getContext("2d");
    collisionContext.globalCompositeOperation = "xor";
    startGame();
    setInterval(loop, 40);
}

function startGame(){
    gameState = HOME;
    birdYSpeed = score = 0;
    birdY = 14;
    for(var i = 0; i < 2; i++){
        tubes[i] = {x : Math.round(48 + i * 19) };
        setTubeY(tubes[i]);
    }
}

function loop(){
    switch(gameState){
        case HOME: renderHome();
            break;
        case GAME : renderGame();
            break;
        case GAME_OVER: renderGameOver();
            break;
    }
}

function handleUserInteraction(event){
    switch(gameState){
        case HOME: gameState = GAME;
            break;
        case GAME : birdYSpeed = -1.4;//"tap boost"
            break;
        case GAME_OVER: startGame();
            break;
    }
    if(event){
        event.preventDefault();//stop propagation chain
    }
}

function renderHome(){
    renderContext.clearRect(0,0,32,32);
    drawSpriteSheetImage(renderContext, instructionsLoc, 32 - instructionsLoc.width - 1, 1);
    updateBirdHome();
    renderGround(true);
    drawSpriteSheetImage(renderContext, bgLoc, 0, 0);
    renderToScale();
}

function renderGame(){
    renderContext.clearRect(0,0,32,32);
    collisionContext.clearRect(0,0,collisionCanvas.width, collisionCanvas.height);
    renderScore();
    renderGround(true);
    renderTubes();
    updateBirdGame();
    checkCollision();
    drawSpriteSheetImage(renderContext, bgLoc, 0, 0);
    renderToScale();
}

function renderGameOver(){
    renderContext.clearRect(0,0,32,32);
    drawSpriteSheetImage(renderContext, gameOverLoc, Math.floor(16 - gameOverLoc.width/2), Math.floor(16 - gameOverLoc.height/2));
    renderGround();
    drawSpriteSheetImage(renderContext, bgLoc, 0, 0);
    renderToScale();
}

function renderToScale(){
    var i, data = renderContext.getImageData(0,0,32, 32).data;
    for(i=0; i<data.length; i+=4){
        context.fillStyle = "rgb("+data[i]+","+data[i+1]+","+data[i+2]+")";
        context.fillRect(((i/4) % 32) * scale, Math.floor(i / 128) * scale, scale, scale);
    }
}

function checkCollision(){
    if(birdX == tubes[activeTube].x + 6){
        score++;
    }
    var collisionData = collisionContext.getImageData(birdX, birdY, 5, 3).data;
    var data = renderContext.getImageData(birdX, birdY, 5, 3).data;
    for(var i = 0; i< collisionData.length; i+=4){
        if(collisionData[i+3] != data[i+3]){
            gameState = GAME_OVER;
            break;
        }
    }
}

function renderScore(){
    var parts = score.toString().split("");
    var length = parts.length;
    for(var i=0; i<length; i++){
        drawSpriteSheetImage(renderContext, scoreLocs[parseInt(parts.pop())], 25 - 5 * i, 1);
    }
}

function renderGround(move){
    if(move && --groundX < bgLoc.width - groundLoc.width){
        groundX = 0;
    }
    drawSpriteSheetImage(renderContext, groundLoc, groundX, 31);
}

function updateBirdHome(){
    drawSpriteSheetImage(renderContext, birdLocs[birdFrame], birdX, birdY);
    birdFrame++;
    birdFrame %= 3;
}

function updateBirdGame(){
    birdY = Math.round(birdY + birdYSpeed);
    birdYSpeed += .25;//Gravity, change this to your likings
    if(birdY < 0){
        birdY = 0;
        birdYSpeed = 0;
    }
    if(birdY + 3 > 32 - groundLoc.height){
        birdY = 28;
        birdYSpeed = 0;
    }
    renderContext.save();
    collisionContext.save();
    renderContext.translate(birdX, birdY);
    collisionContext.translate(birdX, birdY);
    drawSpriteSheetImage(renderContext, birdLocs[birdFrame], 0, 0);
    drawSpriteSheetImage(collisionContext, birdLocs[birdFrame], 0, 0);
    renderContext.restore();
    collisionContext.restore();
    birdFrame++;
    birdFrame %= 3;
}

function renderTubes(){
    var i, tube;
    activeTube = tubes[0].x < tubes[1].x ? 0 : 1;
    for(i= 0; i < 2;i++){
        tube = tubes[i];
        if(--tube.x <= -6 ){
            tube.x = 32;
            setTubeY(tube);
        }
        drawSpriteSheetImage(renderContext, tubeLoc, tube.x, tube.y );
        drawSpriteSheetImage(collisionContext, tubeLoc, tube.x, tube.y );
    }
}

function setTubeY(tube){
    tube.y = Math.floor(Math.random() * (bgLoc.height - tubeLoc.height) );
}
            
          
!
999px

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