Nice lil scene there. I d suggest to check out some lil items for your next dio .
1)The uniformity of the grass colour is not usually met in the nature , not even in football stadiums. Try a lil dry brushing and some colour variations. This can be fixed now. Same goes for the bushes
2)The uniforms from some angles of shooting show a lil shiny or glossy effect that maybe have to do with fingering them after painting . This could also be fixed with some pastel use.
3) I believe that some shadow and highlighting could be used on the figures to enhance their presence. Also some washes and weathering on them would improve the realism
4) Some sleeve joints on the figures show but some other dont . I think that u must follow a rule that u choose on all your figures. I prefer not to show them at all . so i use a lil putty and sanding.
5) U have a nice potatoe bag there !!!!!!
Just few nitpicks to help u improve there
Keep on trying , u re on the good way my friend