I was wondering if antone can tell me how to get the key to the door in the part where the hedgehogs are?

In the very beginning while you are at the trees with the monkeys, you need to jump on top of the first tree going down the hill and jump across the tops until you reach a semi hidden entrance at the top right of the first area. There will be four red coins on the outside, then you go in and thers and flower and if you drop down there will be the key. Good luck! Hope that helps.