[joke]
-I like the lightning, but you probably would want some light props with them
-there are still dev textures visible, maps in beta should not have ANY dev textures
-there is no alternative path to the cart making it a quite a chockepoint
-The track is a bit too short, I think you are missing the 2nd and 3rd stage
-you forgot to compile with hdr.
-I can't shoot portals at the roofs, is this on purpose?
-Touching the cart doesnt kill you, in the map [ame=http://forums.tf2maps.net/showthread.php?t=8747]photofinish[/ame] they do, why do you not use that standard?
After you fixed these issues you should submit it to gameday so you can find other bugs
EDIT: also 256fort looks like 2fort, this can confuse new players so to compensate for that it might be better to make the gamemode capture the flag
[/joke]