* Reset the distance meter back to '00000'.

* Reset the horizon layer. * Remove existing obstacles and reposition the horizon line.

* Reset horizon to the starting position.

* Update the canvas width and scaling. * @param {number} width Canvas width. * @param {number} height Canvas height.

* Setter for the jump velocity. * The approriate drop velocity is also set.

* Update the cloud position. * @param {number} speed

* Update the horizon line. * @param {number} deltaTime * @param {number} speed

* Obstacle frame update. * @param {number} deltaTime * @param {number} speed