Nice shots, but I think you are cabable of better

They look like they may be a little dim, I would maybe try using a slower shutter speed (1/60th is the lowest without a tripod) / smaller F stop/ or higher ISO. You also might want to try playing with the white balance.
I think this website is very helpful in explaning some of the different settings:
http://www.ximinasphotography.com/lessons/index.html