I do like what I see so far, even the H2O system which is like 13761387443061 years old. Love the fourth boss' gimmick especially, but up to now I can see quite a few design problems and annoyances, just stuff that just isn't right for them to do, nevertheless not being very ZUNlike in design (although this is just my problem, it doesn't really matter).
Also I'm happy that a game as popularized as this one has music that I can trump. Confidence booster, hell yes.