Hey @Sophie13! Now that you're in the room with all the nests, you'll need to make your down, which will lead you to the room with the pickaxe, which you'll need to go out the exit on the left.
To progress downward, draw eggs in all the nests that you can and find their corresponding feathers. Also be sure to rain in all the buckets that you come across, as they will provide walkways to areas/give you a better vantage point to draw eggs in nests. Eventually, you will find a yellow feather which will take you back to the beginning, but if you've been drawing eggs in all the nests, the feather to the right of the door will take you to the bottom of the level and you'll be able to walk across a walkway and go downward into the pickaxe room!