In Notepad Invaders a game has been created on one of your notepads. At first it just looked like a regular drawing but as you look closer it starts to come alive. The goal is to destroy all the invaders without being killed first. To do this, use your mouse to move either left or right on the paper to avoid the fire coming at you from the invaders. To fight back, click with your left mouse button to shoot. Keep in mind that there are barricades in place. You can hide behind these to not be hit but the invaders will be doing their best to destroy them.