Thanks for the hint! The problem is that i prefer to draw on an iPad and it Seems there is no good programm for coloring Running on it. But Maybe i should do the coloring later on the desktop and i am definitely Going to Check out grafx2 for that! 

A childbook in pixelart? :)

Also a common mistake is in the choices and making the colors. The forest clearly contrast with the rest of the scene because of the color. One might want to washed out a little bit the green or adjust the whole colorimetry to have something more balanced. Grafx2 provides some very nice features allowing you to produce perfectly balanced gradient. :)