After 2 months I finally got it, I'd become fixated on a particular route which is wrong and then on nearly the correct route but kept going round a block which needed pushing out of the way. Fine picture by the way.
Sorry, low rating from my side. I found it unpleasant visually (am old, it's too small), and rather annoying as there is no special trick: it's just a matter of trying routes until one works.
For me, this is absolutely 5 stars, because the elephant is so well done. Looks very beautiful. The title is very cute, too. And the path is kind of hidden (I had to give it another try :) ).