I will also give color to my little shapes. You could do it manually, that I recommend you to do, but I will do it using layer styles.

...outer glow.

speed environment tutorial



speed environment tutorial



speed environment tutorial

Here I've changed outer glow color.

speed environment tutorial

Some details to my background. I'm using Flat brushes for that.

speed environment tutorial



speed environment tutorial

Now I'm adding some color to the image by using low flow any king of
   
torn or texture like brush.

speed environment tutorial

I'm erasing back all the elements that I don't need to be on my background.

The background must not have a lot of contrast.

speed environment tutorial



speed environment tutorial



speed environment tutorial

And my final step in Top down gradient.

speed environment tutorial

Oh, almost forgot just use Sharpen filter on that it will create and amazing effect.


speed environment tutorial

Hope you've enjoyed my Speed painting tutorial. Practice a lot: speed and quality will come in time.