Just try and control with your camera, if you don't have one, then... you aren't going to be able to test this sorry :/ In the full version of KI there will be an option to have this off or on, so, if you don't have a camera or if it is bugging you can use the default mouse movement.
This is a feature imagined up by sonicfan12p If you would like to suggest a feature for KI, please visit this forum topic: http://scratch.mit.edu/discuss/topic/20071/