Here's my review of the two new levels (I had to hack (map mapXX) to go to those levels in 1-P)
Crisis City: It looked not bad, it's good, but still a bit short like white acropolis, since I seen that both of them are kinda long... still good. Also those buzzes came out of nowhere hurting me, put them visible to the player's eye when it comes in the desired section. It needs to be improved. 8,5/10
C/C Mach Speed: 3 words...
TOO
MANY
BOXES!!!!!!
Do you think it's easy going at high speed with only 15% of the way clear??? Especially when the boxes are too high to jump??? agh... the final part was horrid, it's good having camera moving in front of you, but it's so hard, I died 3 times trying to beat that part, it was very hard strafing in that part, it's also impossible to strafe in this stage without hurting one box. Also, are you sure the tornado moves, because it doesn't look like it. Redo this stage on taking out some boxes, especially on the final part. 6/10