A hybrid between lemmings, dungeon keeper and tower defense. Change the terrain and set up deadly traps to punish the puny adventurers who presume to steal your treasures.
I think I'm gonna actually develop this one!
Good luck to all who enter the contest , I've seen some stellar works.
This was so much fun! It's my first pixel with such a limited palette.
thanks for looking,
ETA: this got a daily deviation on Deviantart http://neofotistou.deviantart.com/art/Mistress-they-are-invading-216634404