just wear a box on your head with the ascii face and have a hammer similar to the one in the gameyou can have the wrench too but i dont recommend bringing a printer
For real, the Beta Player model might be the best thing to base the costume off of.Mostly because of the connected arms and legs.
base it off of your blockhead
make everything out of cardboard, the game's really angular so it works fine for thatmake it either a) your blockhead or b) the default one