add 2048 game

[moskkat40]

• DEMO LINK

[etojeDenys]

lgtm

[etojeDenys]

Suggested change

	case 'ArrowLeft':
	game.moveLeft();
	score.innerText = game.score;
	break;
	case 'ArrowRight':
	game.moveRight();
	score.innerText = game.score;
	break;
	case 'ArrowUp':
	game.moveUp();
	score.innerText = game.score;
	break;
	case 'ArrowDown':
	game.moveDown();
	score.innerText = game.score;
	break;
	}
	case 'ArrowLeft':
	game.moveLeft();
	break;
	case 'ArrowRight':
	game.moveRight();
	break;
	case 'ArrowUp':
	game.moveUp();
	break;
	case 'ArrowDown':
	game.moveDown();
	break;
	}
	score.innerText = game.score;