Pretty good CS. I really like that facts that monsters come out of nowhere with no sound. Yet you should alternate, because it tends to be exhausting to be always on alert.
Otherwise, good level design, nice plot even if it's not that deep.
I liked the fact that you had to manage your light, most custom stories give to much and I always end up with unused stuff.
This mod is one of the best, but there is always room for improvement, like fixing common errors (game crash errors, mismatch and lag), though some errors can´t be helped, there must be a way to make the mod so it minimizes the errors, if the Contra team can manage that, they truly have earned themselves a 10, as this mod is nothing if the game can´t be played.