You can get the keys if you have Task 3 completed (Alcamey Lab restored). You must make a potion for "light and spring", which i believe is Cactus, Lotus, and Rose. Then, drag any villager (excluding the nursing mothers), over to where the roses are. and the action should say "trying to reach key". This is a really good shortcut!

Alcamey Hints

C-Cactus

L-Lotus

T-Tiger Lily

B- Black Orchad

R- Rose

C/C/C- Makes villager fell better

C/L/R- feels light and springy

R/R/R- fells romantic

R/R/C- feels fertile (if you try to make men drink it, they run away!)

R/R/L- makes villager dance

C/C/L- makes villager healthier

C/C/R- smells somthing yummy

C/C/B & R/B/L-makes villager sick!!!!

T,T,L &C,C,B -bitter (after drinking, drag villager to robe to become cheif. They automatically will)

C/T/R- villager will speak gibberish

R/R/B-villager will feel lonely

R/R/T-stinky breath

R/T/L-feels woozy

T/T/T & T/T/R- weeeee what a fun potion