How can I get into the chapel?

Hint 1 of 4:

One of the kids outside the village mentioned something about a key.

Hint 2 of 4:

He gave it to the old man.

Hint 3 of 4:

The old man will help you for a slice of tart.

Hint 4 of 4:

And the inhabitants of one of the homes in the village will give you a slice
if you sit down at their table.