when i try to destroy the hanger and the supply depot it is really hard to get the mouse to find them and they take damage at a much slower rate than the other hardpoints? Any ideas about why this happens or how to fix this?
I have the same problem as you as do many others.
See here (
http://www.lucasforums.com/showthread.php?t=158826).
Hopefully they fix those bugs in the full version! Heck, a demo patch is probably in order, it's not unheard of for demos that aren't fully playable like they're meant to be...