Tidy it up
I think that this piece is in desperate need of tidying up - the black line between the sky and land should never have been there in the first place - try blending the colours together, to give an impression of a landscape where grasses wave in the breeze, for example.
The cloudscape is a decent effort, I'll give you that - While it could use the attention to detail that a lot of this image shows, you have got that certain abstract feel to it, which is nice.
Finally, the three figures - try making their eyes look less like random scribbles and if you're trying to make them look perfectly round, spend some time making it look round. If not, at least fill them in with black, as it will look much better.
They have coloured flowers on their lapels, so why not give their suits some colour as well? No self-respecting person ever wears a white suit with white shirt and black tie. At least some colour in the shirt should help.
Lastly, you need to sort their mouths out - the teeth don't follow all the way to the lips - perhaps drawing some gums would help, plus it's a colour opportunity. Also, I've just noticed the copy / paste / flip that you've done here - it's a cheat and does your work no justice.
[Review Request Club]