I actually had a similar idea a few months back,but my idea was to set up furniture items in my house to tell a story,maybe as part of my maze. I still plan on doing that i just haven't gotten around to it yet.

BTW my maze in my ph is set up to be fun and not for gaining gralats. You can simply cut through the bushes you need not use your bombs. IMO houses/mazes should be more about fun and entertaining others not about suckering noobs in to get easy gralats.