Mission 4 I managed to play... Nice mission too, not too easy and not too hard. I used the heaver units to smash the enemy base, I love the tanks.. Or the units avalable in the factory no 6. the the ammo they fire and effects, very good.
Mission 5 I have some issues with. A nice level, but I think the begining is a little too hard. The units I have are low on health and the enemy units that appear through the star portal are overwelmingly hard, and I cannot sniper them. (Shamefully I had to use health cheet to pass this part) but once they had gone it was OK and I played normaly., Only unit that was left was the enginer and his health was 1%. I liked the minefield.... I wont say too much.. Don't want to spoil....
Mission 6 looks hard, but have not played it yet... Wife came home... Nagging about me on battlezone.. Have to close it down