Help with the blue key in the machine

My problem isn't so much stuck on a part of the level. It's that I have used a walkthrough, which shows this wall that I can walk up in the forest part of the machine to get the blue key, but when I go to the part that the caster did the wall isn't there. I am running version 1.1 and so was the caster. So what is going on, and what can I do to fix it? Is this some strange glitch in the saved game file? Or does my  version of Knytt stories not have that wall which leads to the key?

Which difficulty are you playing on? The Machine's keys do not appear in the easy version of the level, only the normal version.

I think I am on normal. Is it possible to get the key after you beat the level? It seems to allow me to wonder around after I shut off the machine

After you get to the congratulations screen you return to the world where the machine is still on and can explore. Double check to see that you are on normal difficulty.

I checked that I am on normal and i was able to get up the wall, I just coulnd't get the key when i played but atleast I know sort of where it is. Are you able to explore any level after you beat it or is it just the machine which does that? For that matter does a level HAVE to be on a difficulty above normal for the keys to appear?

There are two difficulties. It should be pretty obvious when you're at the beginning.

If I remember correctly, blue key is an umbrella jump. Double jump, open the umbrella at the peak of your jump. Hold 's' as you float.

Are you able to explore any level after you beat it or is it just the machine which does that?

Depends on it's design. It is up to the level creator.

For that matter does a level HAVE to be on a difficulty above normal for the keys to appear?

No. The two difficulties in the machine are actually two separate versions of the same world. The keys are only in the normal version.