Well first.. I think your link to the scores for movement 2 and 3 were mixed up :).
But anyway.. let me be the first to say that I absolutely ADORE this piece,
Movement I was fantastic, that melody you had there seemed so playful I could almost imagine it being played as backround music to Tom and Jerry or something. Your use of syncopation throughout the piece only intensified my interest, the little off-beat 16ths gave this movement an almost march like feel to it at times. Your harmonies were interesting as well.. the dissonance that you have going on throughout (in this context) made the the music seem very comical.. I'm not sure if that's the effect you were going for, but that's what I took from it.
Movement II was such an incredible contrast from the first, I really wasn't expecting it at all actually (which by now I'm sure wasn't by chance :P), but it was beautiful. The only part that seemed faintly reminiscient of the previous movement was measures 17-19 where you have those little staccato 8ths being played.
Movement III was an excellent movement to wrap this piece up, I was half expecting you two quote previous themes from the preceding movements not sure why though, lol. This movement like the first seemed very playful.
Overall, like I said earlier, this piece is great. I love how short this was, playful, and to the point. Oh, and really the only thing I have to recommend is that you maybe use more polyrhythms in your works.. I think they would add more to your already interesting rhythmic tendencies :P