The FPS are excellent, and I didn't see any major errors that stood out. The only thing I can say that would improve the visual quality (I'm speaking strictly eye-candy here) would be re-scale a few of your textures and use a few different brick textures to create some more variety. Some of the texturing on your meshes is a little wonky, but as I said earlier, NONE of this effects the gameplay, which looks to be great, and I'm sure that you're only going to improve as you continue to map.
The only real thing I didn't like was this:

Once you jump into that corner, you're stuck. I tried numerous times to see if I could get out, and I couldn't. I'm not sure if this is intentional (to trap campers
Anyway, great job, and I look forward to seeing what else you make in the future.

