Its very nice,
If could just make a suggestion... try to find out the exact translation of the pieces title in russian, and you will get an idea of many small details which would give it that confused, histerical, agitated character which it needs. I think it needs some more contrasts between the bass motifs and the repeated note theme. Those constant changes from from nervous histerical high pitched laughter and the 2 note bass theme have to be extreme, it kind of lacks character. And when you have all the small notes in both extremes of the keyboard at the same time, you kind of ruin the effect by only thinking of the first note of each group, its hard to explain here, but the downward scale, fast slow, staccato or legato should always have that kind of entonation, dont ruin the effect by just playing the first note loud and running throught the rest.
The first measures are pure gold though.
Wow, hope to see more of youre playing here.