Hi everyone! I am currently doing the Flappy Bird Tutorial on lessmilk.com. In the tutorial, the jump function is called when the spacekey is hit. // Call the 'jump' function when the spacekey is hit var space_key = this.game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR); space_key.onDown.add(this.jump, this);I would like to add touch input to the game, however when I add: game.input.pointer1.isDown(this.jump, this);the game does not even start (I can make the "bird" go up and down, but the pipes aren't coming. Can someone lead me to the right path?