OK, you want to know how I made it up on top of the cupboard.
First to the table with the puter printer on it. Those extra few inches of the printer help and I just leap from there to the top of the cupboard. I am a very good leaping kittie, I am strong so can push myself pretty high from 4-5 feet.
A simple leap back and forth to get above the window from the cupboard.
To get down, there is another table top behind the couch or I can land on the back of the couch.
But maybe a video will work better than words. At least for the coming down part.