I love the concept of your new wall which has lots of elements in it. The colours are lively.
Plus, you have included many things for the background and I love the idea.
However, more tones could be used to make it better. For example, more contrast can be added for the mountain and trees. You can add some glowing effect for the fireflies and they would look lively. XD Perhaps the grass can be darken to make the characters stand out. You can refer to photos or works of other wallers to see how they achieve the effect.
I can see improvements in your work. Keep it up! Looking forward to see your new work. ^^