So you're sliding around when you walk anywhere in the map?
If you're curious, the way to simulate that in the map is by a func_friction field. That's what I did in esf_frost. You create a brush over the ground which you want to have a modified friction. You tie that brush to func_friction, and set the
Percentage of standard key to a number between 0 and 100. This is the percent of normal friction the player will have within that field. Don't forget, however, to have a field elsewhere with 100% friction set, as friction is stored on the player, and won't be reset when you leave the field of lowered friction.
However, It's unlikely you'll have done that to the entire map (and by accident), so check what I'd first assume to be the problem: the server-side friction setting. Type
sv_friction in the console and see what number it displays. The default is 4, and if it's set to lower, you'll be sliding around the entire map as if it were ice.
Also, I noticed in your screenshots that the tree models aren't transparent. Did you remove the transparency from the leaves?
The map doesn't look bad. Looks like you're getting a feel for mapping. =)