First secret of the learning
here 
I didn't bother to read all 48 pages, only 25 but I saw the part about the red bombs maximum effectiveness and I tried, but after falling down from the place there I got outside the
boundariesboundaries of the next
levels and when I jumped down I got to 2 other
levels, the
secondreachable again only with that same trick.
After that there is a little funny
message
But I jumped and I got
thisthis (sorry for the lateness of the screenshot, I didn't expect to be attacked by pears from all sides and had to freeze 1 or 2, the spawning point is at the block where the frozen pear is)