My First Painting

The following is the first painting I've ever done, if you disregard the 3 or 4 hideous ones from the past. But they don't count because they sucked. For future reference, this one won't count either.
I have begun the painting stage for my school project. I will be illustrating the story of Hansel and Gretel. This is my first attempt. It's unfinished too. Hansel and Gretel will be painted in the light blobs. I used "Turner Acryl Gouache", 2 brushes, a cup of water, printer paper, a dinner plate for a palette (it worked), and a coffee stirrer for a palette knife (it didn't work). This is only a practice background for a layout I already planned. Tomorrow I'm going to paint the real thing.

I'm sorry you had to see that.

My eyes tell me this: everything is fine , except the moon and the clouds suck. Maybe it has something to do with the fact that the clouds are darker than the treetops, and the moon doesn't contrast enough with the space around it. Also the treetops should be more detailed rather than being a clean border.

My eyes are stupid though. So if there is anyone out there with experience in painting, please tell me the stuff I gotta know to be more better.

If it helps, this is the process I went through. I mixed blue and green to make the night sky color, then diluted it with lots of water. I washed a bean shape onto the paper. Then I painted greener, darker treetops on top of the sky, and washed the rest of the painting below the same color, but a little more subdued. Then I painted two lighter blobs where Hansel and Gretel will be, and kind of blurred the edges. After that I painted in the clouds and the moon. The painting is only about 10 cm wide.

I spent less than an hour. My paints were beginning to dry up and the paper was droopy. Somehow things felt hectic.

Please advise. (sooner would be better)

EDIT:

None of my family could recognize what the painting was supposed to be (my brother thought it was an owl, my dad thought it was a bear). I hastily added hansel and gretel with a graphite pencil and suddenly they recognize what the picture was. I've added the new picture here:

I'm not much of a photographer.