On the positive side, your exposures look good and you have reasonable sharpness, without the artificial, fake, oversharpened look that some people favour. You seem to have that rule of thirds thing going on in spades, which is quite good for a beginner, but to see it over and over, shot after shot can appear a bit cliched. I think for a newbie the shots show some creativity and imagination - more than I can manage after several year of taking photos.
On the negative side, for me the photos don't really hold any interest. They are everyday objects and, where you have lifeforms, they don't appear to be doing anything very interesting. They make me wonder - "Why was this photo taken; what is its purpose?". If they were to accompany a story, or appear in a brochure, then that would make some sense, but as pieces of "art", standing on their own, I see little appeal. Now if that first cat was stalking a mouse, and we could see the mouse..... Magic!.... but I don't see a mouse.
Of course, all that is purely subjective - just how I react to them - so that is not criticism as such, just that they don't suit my taste. Probably the best one, as an item on its own, is the cup, simply because it is plain and simple, with rich colours, and a little bit unusual as a viewpoint and might do well in microstock.
The portrait of the cat would make a nice "pet photo" but I think the background is rather distracting so you might want to crop that out somewhat, or choose another setting for the shot. You have isolated the cat from the background, through DOF control, but the background is still kind of busy and brightly lit so it does grab the eye. If you want to explore techniques a bit you could try shooting in manual and underxpose the background, but use flash to give the cat the correct exposure. That would then let the cat stand out far more, and take away the pull of the bright areas.
I mostly shoot wildlife, landscapes and a bit of motorsport - things that have beauty in their own right or at least have an obvious story. It would never occur to me to go around photographing shoes and alarm clocks, unless I had an assignment to do that. Like I said, I have little imagination 
As you seem to have the technical stuff under control I think you might want to explore subjects with a broader appeal. I just can't get excited about a key sticking out of a lock, even if it has scratches around the lock 
Overall though, if you've only been shooting a DSLR for a month I think you've done a great job so far. Keep it up
