The big red door is locked
Left of TOP FLOOR (from the lift's top stop) is THE BIG RED DOOR. It doesn't open.
Nudge 1Where to look
It's the boss's office. Who would have the key while the boss is away?
Nudge 2A stronger push
The person who keeps the key wants cheering up, and a present would do it. A colourful one, that grows outdoors.
Nudge 3Almost there
They grow on the island in the jungle river (Getting across the river).
What you needOther problems to solve first
Solve these first (each opens its own page, no answers on the way):
Show the solutionThe whole answer, with a video
Bring the bunch of flowers from THE UMBABWE ISLAND to Pippa at reception. "OH SEYMOUR, THEYRE LOVELY": Seymour tells her Dirk has gone to Miami and the script can't be found; she says it's in his office and gives him the office key. Take the lift to TOP FLOOR's top stop, walk left and press action at the big red door: "WOW! THE KEY FITS!".
Why it works
Pippa's script looks for the flowers, takes them and places the office key. The door checks for the office key every time, so keep it until you're inside.