Step One: Just past the continue barrel, you
Step Two: ...throw the barrel at the wall
will arrive here. Jump up to the ledge and
to reveal the bonus room.
get the barrel. Then...
Second Bonus Room
Step One: Just before the exit, pick up the
Step Two: When you get to the ground,
barrel you will find and jump over the
throw the barrel at the wall to reveal the
tire with spikes on it.
second and last bonus room of this level!