There are a bunch of problems that need to be fixed:
1) Missing textures: see pictures below.
Spawn Room Missing Texture
Endings Room Missing Texture
2) Vvis didnt run correctly. Maybe there's a leak because i can see other parts of the map through the skybox
Possible Leak
3) Red floor in combine room: In 1st stage, it doesn't push. In 2nd stage, its so slow (useless to use if its that slow).
4) Trap 1: Can jump around to avoid the lasers.
5) Trap 2 & 4: The func_doors move very slowly. Maybe speed up and check that block damage is set to like... 500 or so.
6) Trap 3: The moving platform is very slow and doesn't return back.
7) Trap 5: There's no trigger to kill the rebels that get thrown off by the fan. There is a trigger under the map, but it doesn't extend all the way to the skybox.
All the endings don't seem to have any problems, and you may want to consider adding few more traps since the map isnt that long.