you have a solid subject
there's that pinkish golden light
I wish there was something more....or less feels like there is not enough of either one the swings are lit by something.....a flash?
I feel an emptiness - not movement or joy - is that what you are trying to show..... a conclusion - the end of a play day?
Wonderful idea for the challenge but I'm not so sure about your composition. I'd like to see a little sky above the horizontal beam supporting the swings. Maybe a little more space on the bottom too. Either way, a very nice take on the challenge.