Phaser game lags with velocity

[mrphaser]

I have a game that is using phaser.io as a framework. Everything works perfect except this part of the code:

 PipeGroup.prototype.reset = function(x, y) {
  this.topPipe.reset(0,0);
  this.bottomPipe.reset(0,440);
  this.x = x;
  this.y = y;
  this.setAll('body.velocity.x', -200);
  this.hasScored = false;
  this.exists = true;
};

The problem is only that it feels shaky when the velocity is applied and the pipes keep moving, they dont move smoothly. Is there any way to fix it?

Github link to game.js where this code is written