I run it again and noted that the city walls are flickering. I didn't spot this earlier because I always took the scenic route. This happens because you used the same X or Y value for the given wall line with overlaping blocks. To fix it, add +-0.001 to every 2nd block, should not be noticable but would remove the flicker.
I was thinking about the end fight. You may want to up the mobs a little. I jumped on the whole group and they couldn't even get close. BTW what kind of mobs you use, orion?
I just noticed that they are next to a trench. I don't know if this is intentional or not, but it would make a great war scene. Put them into the trench in a line, facing toward the city. Then drop down 2-3 layers of sleeping bags (+0.3 elevation/layer). Or just make a few machine gun pits and make them kneel there.
Also noted that the bottles are gone and the plating points are placed very accurately. Nice.
Thanks for the additional feedback and it took a little playing with to move the bottles and still get the same effect out of them. Also appreciate tip on the city walls. That is a good trick. I'll do that tomorrow and I'll look at creating the battle gun pits. I actually used Romulans, I didn't think about the Orion's. I might change them up to that. It would probably lower the player level requirement too.