I listened to your waltz. The concept strikes me as interesting, and so does the way you work with harmony: you clearly try to move away from conventional progressions. The semitone relationship between the triads sounds interesting and vivid. But, purely in my opinion, it isn't very well realized here. If you make a signature feature out of this progression, it should be carried through the whole piece, very clearly and consistently. Yet in bars 6–7, and again in 9–10, you break your own scheme, and the piece goes from interesting to a bit dull. If you had held on to this harmonic ostinato (G minor and F-sharp minor), it would have come out much more convincing. Good luck! =)