Shopping Mall

There are a lot of hallways and doors!  Where do I go?
How do I get to the key under the wooden pallet?
I have the key, but where do I use it?
I found a locked door with a keypad on it!  How do I get through?
It's dark!  I can't see!
There's a ladder that Heather can't reach.  How do I get to it?
How do I get past the swarm of bats?
I found a walnut, but Heather can't open it.  What do I do with it?
How do I open the door with the crescent on it?
How do I defeat the boss?

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