That looks pretty good overall; since you want critique, though, I might as well give my opinion. I'd say the quality starts to degrade about halfway through the set. Do you have to have a certain number of images? If not, I'd maybe cut it down to a dozen or so. Just be very selective.
First up, I like the the first picture. My only complaint is that the man is quite small in the scene; if he's the subject, I'd prefer less sky. As it stands, he sort of appeared to me as a surprise—not necessarily a bad thing if it was intentional.
I also like the
sign one—how often people ignore signs and others asking for attention.
The beach picture with footprints isn't bad as a water/sky photo, but the footprints seem misleading. In my brain, the footprints should connect with the people on the rocks toward the back of the photo, but they seem to be disjointed.
Next up is the log picture: the slanted horizon makes me dizzy. Because of gravity, it looks like the log should be rolling down the slope, but it's not. Also, the can steals my eyes about halfway into following the length of the log.
The rope picture is interesting. I can see why you'd have wanted to take it, but it's very visually confusing to me.
This one is sort of boring. There's really no subject here besides the perspective of the barrier.
As for the frame-inside-a-frame picture, there are too many intersecting lines at odd angles to be visually pleasing.
And that's about it for ones that stuck out to me. If you want a few more tips from a pro photographer, check out this post from Scott Bourne:
Seven Tips for Building a Portfolio. Granted, you're not trying to make a living from this portfolio, but it wouldn't hurt to read it. Also, keep in mind that any of the things I said above can be disregarded if you have a specific reason for doing so; just don't let issues into your images by accident, and you'll be okay.
Having said all that, you should be fine. Good luck! Oh, and if you're interested, Michael Freeman wrote a
book on composition that I highly recommend. It'll make you ponder a lot of things that are normally intuitive and hopefully give you a new (and improved) perspective for your photography.