Pros:

-Maps are sizable, look great, play well and provide an adequate challenge.
-I like the No Mercy style used.
-The mini-finale with the tank was fun.
-The intro was cool.
-Many cool moments, such as the tank on the large street littered with cars or the huge fall to the ground if punched off by a tank on the finale (better than on No Mercy, as you can actually see the ground you fall to!).

Cons:

-Occasional frame-rate drops
-Finale felt a like a slight weak point in the campaign. I would enjoy a finale area with a slightly "cooler" layout than the top of the small, square structure.

Conclusion:

I thoroughly enjoyed your campaign. It was a load of fun and was quite action packed. A lack of item spawns forced me to cherish each item rather than spam them (a good thing). I would say to add a bit more details and improve the finale layout and you have one of the best custom campaigns I have ever played.