When you reach a bumper in
the block and bumper type area, flip it red and then slam
into it repeatedly to break to send it flying. Roll around
the area where it was, and you'll reveal a red star!
Blue Star
Right after the red star,
heading up in the level you'll find a place where you can
jump in three holes. Do this somewhat quickly and you'll
become invincible long enough to break through the bumper
ahead and reveal the blue star!
