I don't have time to listen to the whole thing, so I'll comment the few seconds I was able to listen to.
You're good at creating atmosphere. The problem is the percussion. The *whack whack* ... *whack whack* didn't seem to go with the mood you were trying to create.
If at all possible, find a good cymbol font, and create a rim effect (not rim shot, but where you roll the rims of two sumbols together, it's a rain like sound) getting louder till you crash them. Then backing of again.
Then I would go into a drum set beat. (tick tick - duga duga tis, d-d-d-d=tis, duga duga tis, t-t-t-t book, budda bump bump.)
Erm, I'm using onomonopeia here, but hopefully you get the opint. Where the book and budda are, use a meduim low drum with a low one. The budda should be a high with the meduim low. The Bump's are the low drum by itself. d's are the meduim low hit for a short beat, and the t's are a hat top sybol (closed) the tis is the hat top (open).