I tried to use a simple Speedlink gamepad in my level using plBipedInput01. Here I set it to analog joystick.
After starting the player can move normally, but the world keeps turning around it.
Debug output shows that joy_rot.y and joy_rot.z have a value of 255. I suppose this causes the turning.
I disconnected all other USB input devices. No result.
Gamepad works fine with other games.
I suppose I have to set joy_rot.y and joy_rot.z, but how/where (read-only)?
Any help will be appreciated.

go to "control panel"->"game controller",and adjust you't joystick.

Move all of your sticks for a little bit and the spinning should stop.

I used to have this problem with a joystick that had a throttle on it. If I didn't flick the throttle around after I started my game, my ship would hit full speed instantly.