No, it is from the very first seconds of game. I have not driven a single meter straight.
Also, the tractor drives backwards by itself.
It does so even with the keyboard disconnected.
Oh, that's really strange. I'm sorry you've got into this trouble. Could you please tell me what platform are you running your game on? Do you have any kind of external controller connected (like from PlayStation or Xbox)?
Thanks! It turned out there was a controller dongle plugged in (but no controller)
Problem solved, fun game! Thanks!