Discuss the massively-multiplayer home defense game.
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Bug, or logic peculiarity?
If you chain an inverted switch into another and feed the first one back into itself, the second one will behave as if it is tripped, yet it doesn't show the tripped sprite and an indicator light on that part of the circuit doesn't receive any power.

I think that having all living animals return to their starting positions would be a good change. Everything else resets, makes sense that pets would too.
This would hopefully lead to less instances where a house has become 'stuck' without the owner even planning it that way. Pet positioning is such a crucial part of most puzzles and the moment it's too easy to screw it up until the owner next returns.
Preventing somebody from robbing the same house multiple times (before the owner has reset it) also sounds like a good idea. I would argue that this should be triggered on vault access rather than family member death, as sometimes there is some, ahem, 'collateral damage' during the recon.
Random colours please
I had thought about a Demon's Souls style sign messaging system. Could be fun, without ruining the feel of the game. At least, in the Souls series, it's nice to know someone else is out there, however limited the messaging system is.
The damage done to a house is only saved if a family member is killed or the vault is reached.
+1 for reselling paintings. Maybe even trading?
You can't really argue against a tile named 'pile-o-dogs'.
I don't see any power going to either set of powered trapdoors. Maybe I'm missing something...
I think removing wired walls entirely would make building many things rather frustrating and convoluted. Perhaps a better solution would be to limit the thickness of wired walls to a single tile. I guess you could still create an 18 tile wire/wall combo that would be unbreakable with tools, but that would seriously limit the space you had left to work with. Removing the conductive property of the steel wall might also help in this scenario.