Very nicely put together. I hope you come back and add some of those brewing mechanics you mentioned, there are lots of places you can take this. I like the tune very much.
My highscore is 7:48 and 1020 Points. Mid-way I was thinking it was too easy, but then it snuck up on me all of a sudden. I'd like some of that difficulty sooner, balancing wiping out blocks with making the match-fours.