I'm not sure if it's wanted or not, but you can start pressing a button before the beginning of the level. I got stucked but i love this idea and the reference :D A good idea is a good idea, you can't say it's only a half.
It's definitely wanted. Some of them can't be completed without doing that. Sometimes Pannenkoek would have to do that as well to get the lowest amount of A presses in a level.