You could try drawing the hair in strands, not as a single mass. It would look a lot more flowy and dynamic that way. uvu
The clothing could use a bit of folds here and there. Even if you wear a tight fitting outfit, when you sit down, there are places where folds appear, for example, near the sides and belly. You could google people sitting and check for yourself - it's pretty hard to explain, but easy to understand when you see it!
About the swings themelves - gravity! The girl probbaly has at least a little weight, so she would be pulling the swings down, which means that the chains should be going straight down.
And one last thing, more like a tip about the plant. I've found that plants such as this one look a lot more appealing if you draw them thinner, but with larger flowers, buds and leaves. uvu
Edit:
Could I get some critique/tips/whatever on this sketch I did of my new favorite Disney character? :'D (You can tell by the huge eyes that the movie influenced my style pretty much lmao)
