go to your documents folder where the savefile is located. it should be: \Documents\My Games\UnrealEngine3\MonkeyGame\Config\

open MonkeyChaseCamera.ini and change the following:

auto tilt
useAutoTiltup=true ; set to false
useAutoTiltup=true ; set to false

auto rotation
useAutoRotation=true ; set to false
NewAutoRotationEnable=true : set to false

this will disable tilt and rotation of the camera