For a start, don't rely on games to teach you aviation!
An a/c has 3 axis, each at 90 deg to the other. These are the the 'Longitudinal', the 'Lateral' & the 'Normal'.
Each axis crosses the other two at the a/c's 'Centre of Gravity' (CG). The CG is the point where there is an equal mass in any direction.
Longitudinal Axis: Runs from nose to tail
Lateral Axis: Wingtip to wingtip
Normal: Vertically ie from below your bum to through the top of your head when you're seated in the a/c - presuming you're sitting at the CG of the a/c.
An a/c moves around each of these 3 axis. Think of each axis as an axle around which the airframe rotates.
Each movement around its axis has its own term, and a particular control surface to make the movement:
Pitch: movement around the lateral axis. You would see this as the nose of the a/c moving up & down. The control surface used are the 'Elevators' (there are usually two)
Roll: movement around the longitudinal axis. You would see this as one wing rising while the the other falls. The control surface used are the 'Ailerons' (again, there are two)
Yaw: movement around the normal axis. This is seen as the nose swinging to one side &/or the other. The control surface is the 'Rudder'.
Elevators are controlled by pushing or pulling the control column/joystick away or towards you. Pushing it away will lower pitch the nose down - presuming you're flying upright & not inverted!
, pulling it towards you will raise the nose.
Ailerons are controlled by rotating the control column as you would the steering wheel in a car. If the a/c has a joystick then you would move the stick from side to side. Rotate the column to the left/move the joystick to the left and the a/c will roll in that direction. Reverse that input and the a/c will roll in the opposite direction.
The rudder is controlled by the two pedals on the floor. Each pedal is joined to the other other in such a way that pushing one pedal forward forces the other pedal aft.
Push the left pedal forward & the a/c will yaw left. Push the right pedal & the a/c yaws right.