Cow at the end up, 3 free, right, block, down, 2 free, right to blue up. After the second right and up to get the keys, blue right, blue up, 2 free, left to blue right..., down... left over the button, last possibility down and with the block to the right side. Up to blue left, last possibility down, at the bottom right...
I hope this is understandable...
Greetings ini