Been playing Ikaruga. It's a vertical scrolling shooter, the main gimmick being that to need to actively switch "polarity". When you are white, white shots cannot hurt you, when you are black, black shots can't hurt you.
I will be surprised if I can ever beat this. You really need to be in some borderline trance zone to dodge all the crazy bullet patterns. After getting halfway thru the 3rd level in this I feel like I could win R-Type without sweating.