That it is. I think I should have communicated it better, but LD is now over. I'm glad you like it though!
Don't worry, I felt accomplished when I got up there...I was just trying to get the huge cross to light up like the small ones :)
I was able to jump onto the left wall (about 2/3 of its height) and then jump over the wall :) There are gray screens, and first you can walk on them, but then, if you go to the left further, you start falling infinitely :)
The game is fun however :)