You capitalised every word in your post?
Oh, the music, right...
Is it called "Waltz" or is it actually supposed to be a waltz? 6/8 time is not a waltz. If you want it to be, you can simply put it in 3/4 and double all of your note values (such that 16th become 8ths, ect.) ... but of course maybe you intended it to not feel like a waltz despite its name. I couldn't possibly tell. One way it makes you look like an ignorant fool, and the other way it makes you look like a right smartass.
The repeat sign at measure 14 appears to go back to bar 7, but instead the MIDI takes it back to the beginning. Not sure of the true intentions here. Also, do you
really want to whole thing to be repeated at the end? If you want it to go back to the start of the piece, write dal capo or D.C. there. The other way it could be seen as is the end repeat going back to measure 18, but you don't have a reverse repeat sign there. The repeats in the piece are just too unclear. You also have no tempo mark, by the way. There should be at least
something there, I think.
I sorta liked the piece, but it was a little too dissonant and chaotic for my tastes. I can appreciate dissonance, but it seems there is just enough consonance in this piece to make some of the dissonances sound overboard. Measure 9 for instances really grates on me ears with the chords in the right hand. They sound unnecessarily dissonant to me. That would be my only complaint, but then again, it can simply be a matter of taste.