Restricting camera to within areas. 2D Adventure Platformer

Here's one trick that could probably work for you. Remove your camera as a parent of your character and then manually program your camera to follow your character's position along the X and Y axis. Your character should still be at the center of the screen. From there you can use if statements to tell your camera "If your position along the X axis is great than or equal to 10, do not stop follow the transform. If your position along the X axis is less than or equal to -10, do not follow the player." Then you just declare a few integer variables stating the maximum and minimum parameters. If you set these variables to be public, you should be able to tweak these variables to meet the needs of the level your making considering that you use different cameras for different scenes. I hope that helps.