Rotate to Path

class Example extends Phaser.Scene
{
    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('lemming', 'assets/sprites/lemming.png');
    }

    create ()
    {
        const points = [
            50, 300, 179, 449, 394, 498, 593, 455,
            701, 338, 692, 190, 603, 76, 423, 41,
            272, 78, 181, 186, 230, 328, 416, 395,
            565, 327, 550, 202, 467, 149, 355, 164,
            343, 254, 428, 303
        ];

        const curve = new Phaser.Curves.Spline(points);

        const graphics = this.add.graphics();

        graphics.lineStyle(1, 0xffffff, 0.5);

        curve.draw(graphics, 128);

        graphics.fillStyle(0x00ff00, 0.5);

        for (let i = 0; i < curve.points.length; i++)
        {
            graphics.fillCircle(curve.points[i].x, curve.points[i].y, 4);
        }

        const lemming = this.add.follower(curve, 50, 300, 'lemming');

        lemming.startFollow({
            duration: 10000,
            yoyo: true,
            repeat: -1,
            rotateToPath: true,
            verticalAdjust: true
        });
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    backgroundColor: '#2d2d2d',
    parent: 'game-container',
    scene: Example
};

const game = new Phaser.Game(config);