At the moment I am currently playing...Twinbee. It's amazing how much the Famicom version put me off this game series, but I'm actually enjoying this one.
I've been playing this some lately as well.
I really suck at juggling bells and shooting down enemies. I'm really good at shooting the bells past the color I want and completely missing the enemies, though.
Having said that, if you just want to see each of the levels (the later ones look AMAZING), I love that there's an Easy setting and you can crank up the # of lives and continues.