Using a mouse with a scroll wheel is an effective way to navigate in Google Earth , but it is only one way. Google Earth Version 4 also supports the use of different controllers such as joysticks. Navigating with these controllers can be more familiar to gamers, especially those who have used flight simulation products.
You can use GForce navigation setting in Google Earth to simulate joystick navigation when you are using a mouse. Using a joystick or other controller with the GForce setting, you can use the yoke to fly like an aircraft. To change to GForce mode, type Ctrl (Command/Open Apple Key on the Mac) + G when the window focus is in the 3D viewer. The cursor becomes an airplane symbol when you are in this mode.
Also note that keyboard shortcuts allow you to move using your keyboard. Learn more about navigation.