I really like what you've done. You didn't mention what kind of camera you had, but I'll assume it is a DSLR.
A tripod is great when shooting brackets! And like Axle said, you probably want to drop the ISO as low as you can to cut down on the noise. Although it helps to take 5+ shots, you could also use the same image multiple times with different exposure/levels.
When I am exposure bracketing, one thing I like to do is, focus the picture how I want it, and then switch it to manual focus. This does a few things. First off, it makes the process faster (No need to refocus the same shot). It also prevents the subjects and perspective from changing on you (really only a problem with faster f/stops).
Overall I would say it looks good! Keep practicing and playing around to see what you like