Build an Interactive Walkthrough Using the Game Engine - Blender 2.5 - page 201

8. Let's start creaing the logic bricks setup for the base object; select it and go to the
Logic Editor; then locate the Add Sensor drop-down and add six sensors as follows:
F Sensor 1:
Type: Keyboard
Name: fd
True level triggering: Enabled (second buton to the let of "Freq")
Key: W
F Sensor 2:
Type: Keyboard
Name: bk
True level triggering: Enabled
Key: S
F Sensor 3:
Type: Keyboard
Name: lt
True level triggering: Enabled
Key: A
F Sensor 4:
Type: Keyboard
Name: rt
True level triggering: Enabled
Key: D
F Sensor 5:
Type: Mouse
Name: up
Mouse Event: Wheel Up
F Sensor 6:
Type: Mouse
Name: down
Mouse Event: Wheel Down