Thought I would start a thread on this, as I have made a lot of progress on this. The original teaser video is at http://www.youtube.com/watch?v=qxePY5gcVRg ... however it has changed a lot since then. I have gone with the more stylised look of the PSP port (which helps with throughput), and the game is now (almost) playable. I need to get the x/y position of a finger being dragged across the screen properly (I can detect a drag end point, and up and down, but not continuous movement if anyone can help). I will probably get to the bottom of it on my own (I generally do). I'll post another video and some screenshots when I get home later.