1. Lack of sharp focus and leaning verticals
2. Blown highlights and a slight magenta cast in the clouds.
In addition to what @Jill_C mentioned in photo 1 (Osaka Park), you would also need model releases for the recognisable individiuals or you would need to crop them out.
Regarding photo 2, it is very important to check your images at 100%-200% magnification. Besides the overexposure and blown highlights that Jill mentioned, it also appears that the photo was overprocessed. The trees don't have any detail in them and have more of a painterly look (perhaps from oversharpening?)
Here are some resources that might be helpful.
Best of luck in your future submissions.