Great pictures! I love the rat one, and Smiley stretching towards the camera.
I know nothing about photography since I only have my phone's camera, but it looks like that one picture was overexposed from the shutter being open for long enough that it let a lot of white light in. Pics can also get overexposed if the focus is on the brightest part of the picture, but I don't know anything about a camera that isn't 'tap to focus' like a phone camera.