This is the game @Niarkou and I made for Ludum Dare 45 in 72 hours.
Ludum Dare entry page · GitHub source code
A few warnings about this version:

the ball does nothing
the cave is not implemented
there is no reward for watering the plants
there is no reward for the riddle
there is a large empty area at the east

We want to work on the game and improve the story when the Ludum Dare voting period is over. Hope you already enjoy it as it is now, though!