The second stage features plenty of platforms, spikes, and bottomless pits. Not to mention plenty of Bladers who want to knock you down the latter. Be careful, and look before you leap.
You'll battle Cut Man and Elec Man a second time here. You don't have the luxury of bricks to heave at ol' scissor head this time, so use the Fire Storm instead. Stay on your toes and the guy shouldn't be too hard to beat. Elec Man is just as weak to the Rolling Cutter/Cut Blade as ever, so bring the pain.
At the bottom of the shaft that is the stage, you'll encounter the second fortress stage boss - a clone of yourself. He can use any weapon you can, and his do a lot more harm to you than yours do to him. The secret to success? Put on the Elec Beam and go nuts with the pause/resume trick.