To me, the music is almost finished. Many thanks to all the comments to the previous versions.
I am willing to revise according to your kind advices. If possible, please keep an eye on those thick chords. Do any of them can be arranged in a better way?
I still have some problems with the notation. In the present version, I am using a lot of invisible dynamic and tempo marks, which probably should be represented by some articulation marks. Also, do not hesitate to point out the strange mistakes in notation. Since I am self-taught in composing and unable to play piano, these mistakes probably are not errors, but something I do not know.