I've added your map to the ev1 beta server so you can playtest it. I'll PM you the details.
Map overall doesn't look too bad, but there are a lot of misaligned textures. Areas like this would benefit from snapping to a 32 or 16 unit grid:
The sideways barrels should have the textures rotated and aligned. A lot of the vertical barrels are misaligned.
You might consider using sun lighting to make things look a little more defined and less uniform (if you do, be sure to take note of this:
http://dplogin.com/forums/index.php?topic=27756.0).
I'm not sure on the gameplay -- the paths don't feel very balanced. It seems like the low path to barrel jump is much faster than anything else. You might consider connecting the high paths, or having a faster means to get up there.