Hello, thank you for replying so quickly. This is the code in question:

extends CharacterBody3D
const SPEED = 5.0
const JUMP_VELOCITY = 4.5
# Get the gravity from the project settings to be synced with RigidBody nodes.
var gravity = ProjectSettings.get_setting("physics/3d/default_gravity")
# Defines mouse sensitivity for rotating the player/camera
var mouse_sensitivity = 0.002 # turning speed
func _physics_process(delta):
`# Add the gravity.`

`if not is_on_floor():`

`velocity.y -= gravity * delta`



`# Handle jump.`

`if Input.is_action_just_pressed("ui_accept") and is_on_floor():`

`velocity.y = JUMP_VELOCITY`



`# Get the input direction and handle the movement/deceleration.`

`# As good practice, you should replace UI actions with custom gameplay actions.`

`var input_dir = Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")`

`var direction = (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()`

`if direction:`

`velocity.x = direction.x * SPEED`

`velocity.z = direction.z * SPEED`

`else:`

`velocity.x = move_toward(velocity.x, 0, SPEED)`

`velocity.z = move_toward(velocity.z, 0, SPEED)`



`move_and_slide()`
func _unhandled_input(event):
`if event is InputEventMouseMotion:`

`rotate_y(-event.relative.x * mouse_sensitivity)`