I've been enjoying your park paintings. Sorry I haven't had time to post comments. You asked for suggestions on this one, and I have a couple I'd like to share, FWIW.
I love what you've been doing with backlighting of the trees. In this one, the purples and yellows work well together as contrast, making the trees come forward with that back-lit look. The near tree is shorter than the far tree, and would seem more in perspective if it were taller. I think the distant tree would cast a shadow, also.
The water-shapes are rather odd, and they come to a point at the left side and the right side of the canvas. Maybe the pond was actually shaped like this, but it doesn't quite "read" right, and you have artistic license to change it, of course.
The area in the middle where there are ducks isn't reading quite right either. I can't tell if they're on land or in water. The foreground land-shapes are a little odd, too. I think it has to do with the roller-coaster-like line where land and water meet, and the feeling of rolling hills between water and near tree.
I made some PaintShopPro changes to show one way you could change it, to illustrate what I'm trying to say. I hope you don't mind!
I love it when somebody does this for me.
P.S. I see a smiley-face in the near tree