The above image shows balloons 2 at the beginning before any of the
balls have been freed. The key problem in the level is marked with
a red circle. That blue balloon is hard to remove. Most people realize
this right away. So the question is... how to get rid of it? After a
little closer scrutiny most people also get the idea that they want
the rotate-left ball on the far right of the yellow stack of balls
to come way over to the left and act as a platform to protect the
tall column of balloons from the spiked ball underneath. With the
rotate-left ball in the right spot the balloons can be dropped matching
up the blue balls to remove the one difficult ball. The reason this
isn't always so clear is that it seems very difficult to get the
rotate-left ball to roll over far enough to the left. But it CAN be done.
First start by removing the balls marked 1,2,3 in the same order as the
numbers...
The scenario you should end up with will look like the picture
above. By creating a diagonal ramp on the left you can drop the
ball so that each drop will move the ball 1 left. No wasted moves!
The above images show the sequence after each elimination and the
rotate-left ball in the proper ending position.
If you did everything correctly you can eliminate some of the blue
balls and get the formation in the image above. With the
balloons supported the lone blue ball on the wood block can now
be eliminated. The rest of the level should be very easy after you
remove the blues.