I can't look at the map right now, but here is some feedback from the screenshots:
- 2 flags in the same room seems really pointless when they're right in line of sight from each other. Might as well have 1 flag worth 10 points. The point of having a second flag is to make it possible to grab when a player is playing super defensively. Since one person can defend both flags easily, there's really no point. It actually makes it more difficult to attack, because you have to grab 2 flags in a single room, giving a defender more chances to shoot you.
- The barrel textures are misaligned (2nd rung from the bottom should be at the bottom).
- How did all the snow get into the cave?
Maybe you could open the top up a bit and show some night sky to make it more interesting and natural looking.
- The center path looks much shorter than the others. Not sure how it plays, but you might want to alter it so it's not a straight shot from base to base.