I'm posting because I see this painting a bit differently than the others--I do not wish to be contrarian. I want only to show support for the plusses.
The size is a very manageable 18 x 20 - I imagine it hanging on a wall. It would certainly cheer up a room and because it is so interesting to me I don't consider it to be too busy. I like that my eye keeps wandering all over it.
Jumper has a very good idea regarding adding some light green to the dark area, perhaps in the upper left, to be a counterbalance to the happy blob on the lower right.
As for those lines.....I like them very much in the second version--again imagining that I am viewing this on a wall, not on a computer screen right in front of my face. The second version reminds me of a stained glass window--I adore stained glass windows with their rich colors, so this painting makes me very happy.
Because I enjoy both versions of the painting, I urge you to paint more than one at least (why I noted the manageable size). I think that it is a winner worthy of several fully-finished sister paintings. Friends will love it, buyers will want to have it. Courage!