Scale game's contents to match the window size

[Legomite]

I'm using Phaser.ScaleManager.RESIZE to make the game window match the browser window. The problem is that if the window is too large, it shows parts of the world I don't want it to show. I want all all game content to scale accordingly to the window size, so if I made the window small, the UI, player, and world would get small too to match the window and make the game look normal. How do I do this? 

 

I believe there was a post about this before but I can't seem to find it..