I have the classic-looking Pix'n Love from French developers Pasta Games for my iPhone, but while its very pretty and stylised - its often annoying because one mis-move of your thumb on the direction soft-buttons and doom beckons. Okay, its not that serious because most levels are against the clock, but it is a pain.
Those dinky soft buttons at the bottom, grr!
Hopefully that'll be resolved by its appearance as a PSP mini with new content, levels and games. It is due out in the middle of March and should be a more rounded experience with proper controls. The below video shows off the new modes (Note to certain other developers, that's how to promote your upcoming mini):