This is a wonderful painting! I love the giraffe. He is the focus of the painting so I would just leave him be what you want people to look at. I would soften the clouds (edges blended) and just gray down the trees so they are not so bright in color. Soften the edges on the tops of the trees too. You can leave the monkeys. When you gray the trees down the monkeys will be more noticeable. Well done!