Hi Mustafa,
As you know it can be difficult to give a general opinion on how someone would translate a visual object into music as it involves lots of components and the initial approach can lead to radically different results. From what I analysed of your piece, your goal seems to translate the atmosphere of the painting, you wrote a Nocturne titled "Lonely night" and the painting itself show a nightlife scene with a sparse bar counter.
What I can say is that your part A (bars 1-17) contains a Theme with lots of syncopations wich is, for me, a strengh into your piece. It gives to your melody a quality of uncertainty that can refer to some extent (each person will construe it in his own manner) to the nocturnal element of the painting or even the wandering of our thoughts when we precisely are lonely at night and even the sentiment of loneliness itself. You superimpose a 3 beat feeling in the right hand to a 2 beat one in the left hand wich also gives this sensation of slight agitation, of a struggle of some kind. Your melody rises toward the high register adding more tension and dissonances between right and left hand are being heard. These elements give certainly a very good musical flavour to your piece.
I would add that from b.26 to b.40 these elements disappear. Of course, as a part B you chose to create a contrast but, you see where I am heading, we tend to lose a little bit of the complexity of the beginning, of the atmosphere that you installed earlier. The music becomes more consonnant and rythmically ordered.
I hope that my message has been helpful โ