Slide the flat end of the spudger under the front edge of the screen and carefully pry it open.

The front edge is the side with the buttons on it.

You may hear a cracking sound when pulling the case off of the device. This is normal, and is just the clips being pulled apart. However, be careful and pull the clips slowly/cautiously to avoid damage.

Be aware of the speaker cable when removing the case, as it is still attached to the motherboard.