Hey Corv, I gave it a shot on my HTC Hero , 1.5 .
It runs fine, but definetly not on the speed it should, I compared the in game clock with a real clock, it runs 83% slower .
One thing you could make to speed things up is to either join adjacent bricks in one single image, or even to draw all fixed bricks in one transparent image, and then just draw this single image every frame, instead of drawing all single bricks every frame (Assuming that's the way you are doing it) .
I also think the maximum velocity is a bit high, it would be easier to control if you set a lower maximum speep .
And I don't quit understand why I start on level 2, finish it then go to level 1 ... ?
You said there's an online highscore, but I couldn't see it, at least not on the lite version .
Well, other than that, Congratulations for the release !
It's a fun game, though a little difficult to me