I'm working on a mod very similar to this >:c
Looks good, great color balance and contrast, very refreshing.
The big flaws for me is how everything is extremely large, especially the wood details are waaaaaay too thick.
The other thing is how far apart everything is, I'm not sure if you used all 128 objects or not but the mod looks incredible empty unless the camera is really far away.
Also the waterfall defying physics bothers me >_>
Nice mod overall, looks crisp and exciting but kind of tedious to play.
Gameplay wise the mod does look decent. It has multiple distinct and interesting paths you can take, although some of the paths seem to have take a lot of running between the obstacles which, as Jisse pointed out can feel tedious.
I question your choice of trying to make the environment to look like a mountain, because to be honest the mod doesn't look at all like a mountain. The placement an shape of the objects have a very unnatural and man made feel to them and just adding snow on top of them does not mountain make.
Try to pick your setting before you start the mod and then design the course around looking like it. Look up some pictures and try to figure out what are the aspects that define that kind of setting. This also allows you to consider what unique gameplay possibilities the setting can allow and thus make the mod even more interesting and exciting to play.