Even though you intended to remake the old PB:fttp maps into PB2, your interpretation of that creation is quite mediocre at best, and definitely needs some fixing. I suggest you take these changes into consideration:
1). The walls should rather be dark plate (4), not concrete (1), and the walls should be overlapped too in order to avoid the the bottom and sides of a wall being next to or on top other walls. It makes the maps look better slightly.
2). The rock behind you as you spawn in the first level shouldn't be there, instead a impenetrable crate or a large wall would replace it.
3). As a player had stated, the enemies should be Blue Marine characters with low HP just for immersive aspects of the enemies in question from the first game you are trying to replicate/mock into PB2's level editor.
4). The Cyber Grub's weapon should be a Shotgun CS-DAZ, but modified so it only fires 1 bullet from it with perfect accuracy. To do this, modify the selected weapon using these triggers:
Trigger Actions :
Gun > Force gun (A) spawn (B) projectiles per shot,
Gun > Change gun (A) accuracy to (B) degrees, and then lastly, use this
Gun > Change gun (A) projectile power to (B)
Once again, the shotgun should only fire one bullet, have its accuracy degrees set to 0 for dead-on precision, and have its projectile power increased from 0.9 (default) to 4 to make up for the nerfed changes.
Anyway, I did rate 5 on both maps, but in reality, they could use some improvement.