UnoGamepadInput.cs

if (_doom == null || Gamepad.Gamepads.Count == 0)
    return;

var gamepad = Gamepad.Gamepads[0]; // Use first gamepad
var reading = gamepad.GetCurrentReading();
        
ProcessButtons(reading);
ProcessMovementStick(reading.LeftThumbstickX, reading.LeftThumbstickY);
ProcessLookStick(reading.RightThumbstickX, reading.RightThumbstickY);
ProcessTriggers(reading.LeftTrigger, reading.RightTrigger);

// ...

private void ProcessMovementStick(double x, double y)
{
    // Apply deadzone
    if (Math.Abs(x) < ThumbstickDeadzone) x = 0;
    if (Math.Abs(y) < ThumbstickDeadzone) y = 0;
    
    // Forward/Backward movement (Y-axis)
    bool shouldMoveForward = y > ThumbstickDeadzone;
    bool shouldMoveBackward = y < -ThumbstickDeadzone;
    
    if (shouldMoveForward != _isMovingForward)
    {
        var eventType = shouldMoveForward ? EventType.KeyDown : EventType.KeyUp;
        _userInput.SetKeyStatus(eventType, DoomKey.W, _doom!, new EventTimestamp());
        _isMovingForward = shouldMoveForward;
    }
    
    if (shouldMoveBackward != _isMovingBackward)
    {
        var eventType = shouldMoveBackward ? EventType.KeyDown : EventType.KeyUp;
        _userInput.SetKeyStatus(eventType, DoomKey.S, _doom!, new EventTimestamp());
        _isMovingBackward = shouldMoveBackward;
    }
    
    // Strafe movement (X-axis)
    bool shouldStrafeRight = x > ThumbstickDeadzone;
    bool shouldStrafeLeft = x < -ThumbstickDeadzone;
    
    if (shouldStrafeRight != _isStrafingRight)
    {
        var eventType = shouldStrafeRight ? EventType.KeyDown : EventType.KeyUp;
        _userInput.SetKeyStatus(eventType, DoomKey.D, _doom!, new EventTimestamp());
        _isStrafingRight = shouldStrafeRight;
    }
    
    if (shouldStrafeLeft != _isStrafingLeft)
    {
        var eventType = shouldStrafeLeft ? EventType.KeyDown : EventType.KeyUp;
        _userInput.SetKeyStatus(eventType, DoomKey.A, _doom!, new EventTimestamp());
        _isStrafingLeft = shouldStrafeLeft;
    }
}