Nice, my mom lives about a block from that park and every time I visit, I head there for a day. You did a great job capturing it! Some of them are a bit over saturated though.
I like image#1 and #4, the image's composition is still need to improve more. But there was good exposure being controlled. For #1, you can capture another "object" in the image, this will let the viewers have different point to view of.
thanks for your suggestion. anyway, what do you mean "another 'object'"? I'm sorry but I really don't get it. I do understand that the trees are not really interesting objects though.