The Caves and the Castle normal - Brief visit

[Freddy]

Although you wrote only one line, I could read between the lines that opening the red door in the room with the purple door was no mistake.

Without succes I tried to approach the green key from below with the ladybug vine and from the left. I also couldn't find a way to a possible room above the green key room, with the hope to come down to that upper left corner.

In weekend I'll do a new effort. Maybe it has to do with the half hidden yellow ladder at the right.