Ah, sorry, I missed the part where you say that you don't want it to change the angle. You probably want to control the object using your mouse arrow right?
Well, in that case, you should take a look in this C2 template 'Space Blaster' which you can find at File>New>Space Blaster:
In this example, the spacecraft moves only when you are touching the screen, but in your case you should change the touch conditions with the ones used for mouse. Also don't forget to add the mouse plugin to the project.