On Level 81 where you see the arrows, exit there when the enemies are all taken care of, you go down the left side of 82 and a hidden red umbrella appears, taking you directly to 83 with a protective bubble!!
Not a great secret, but 82 was rather hard for me the first few times I went through it, so figured I'd share this for anyone getting near there or having troubles.
Oh yes, and I unlocked
finally!
