Nice map. I think it will have good flow and it looks fun to play.
Ive do have a few suggestions.
Make the spawn rooms brighter. Id say putting a
light with 100 brightness or so in front of the existing light sources to brighten them up and cast light on the walls themselves would be good.
Add a disposer to the block spawners.
Check the "Damage Activates" flags on the block spawning buttons. This way we can shoot the bottons with the grav guns to spawn buttons.
Texture the block spawning buttons with sf/spawner_buttons_blue_01 and sf/spawner_buttons_red_01 *
*If your not sure of the easy way to do it, just create a 128x64x64 brush and texture one face with the appropriate spawner buttons. Then enable texture lock (tl on the toolbar), cut it up into the right pieces and move them around till they look like you want them. If you want to change their size, you will also need to enable scaling texture lock, which is right next to tl.
