I don't know of many people that have encountered this, because I can't find a forum about it...

On the mission "saving the ship" I am unable to move correctly. It is as if the controlls aren't being processed correctly. Sometimes I can move alright, other times I can't move backwards. My character also continues to "glide" after I let go of my keyboard. This is the only level it happens on and I can't figure out a solution... If anyone else has encountered this or knows of a solution, I would be incredibly thankful.

the last post in this thread solved my mouse/movement issues: https://www.gog.com/forum/star_wars_republic_commando/new_graphics_fix_by_leon_bumpmapping_problem_solved

it seems to be related to framerate issues. at least for me it was.