Osawagase! Penguin (JPN) or Amazing Penguin (NA) is a really fun action puzzle game. Received my copy in the post today and I haven’t been able to put it down when I have a spare moment.
It’s like QIX but a lot more involved, and with clearly marked territory chunks that enemies run about. This changes the dynamic of the game where the number and shape of enemies/density of territory chunks/size of the overall play area determines how hectic things get.