Sounds like fun. If it were me, I would (learn how to) set some death traps and hide behind them using them as personal defenses as well (and probably all underground). I have seen a fellow create something where you walk through what you believe is a perfectly normal door but it's set to chop you in half as soon as you walk through - though - I don't know what your building limitations might be material wise to create such things.
My first thought was of the Philly skyline (probably cause I just moved away from the area). There most noticable buildings have some art deco shapes that might be a fun influence for MC creativity. My second thought was of the space needle in Seattle and my third thought, after reading the previous reply, was that other famous building in Dubai that resembles a ship with sails. Re-creating that graceful curve would be a challenge in MC.