Couple problems immediately pop out for me:
Mind your consistency.
1) In the palm and the ground you jump values - light & dark -- your darks don't match.
2) The color temperature -- the ground is very warm color in the shadows. The tree isn't.
When you're painting, it's helpful to not just think of the colors that are in the light, but also in the dark. Both are important. But the darks are more essential because they create the framework and sense of the distances and overall intensity of the light.
The lights can vary because the lighting may hit the objects differently and textures and materials and local colors all vary. But the darks need to anchor all that play of the light and make sense of the picture for the viewer. So it's all about consistency or it will look like a cut out pasted onto another picture.
Other than that I feel a sudden taste for a vacation drink with an umbrella in it -- not that I ever had such a vacation, but it seems tropical and luxurious as inspired by your setting.
"Not a bit is wasted and the best is yet to come. . ." -- remembered from a dream