Thanks for the feedback! We admittedly definitely could have explained the movement controls a bit more. The movement controls are based on the Mechwarrior games, meaning the mech's legs are rotated with Q and E, while the body is rotated with the mouse. Movement overall is based on the direction the legs are facing, so if you're not looking in the same direction the legs are facing, movement feels slow and weird.
We may want to put more detail on how this works on the controls and jam pages, so thanks for voicing your problems with it!