Special "low blinking" or "transparent" brick - in brick colors menu
only 1 per hospital charge so you will have 50 normal bricks and 1 mine brick.
Mine brick = like "grenade bomb" but you must build as normal block in floor or on wall.
So you have to be more careful in where you move.
Game will be more realistic and more funny and more strategic (mine fields).
Matej aka ":o)"
PS: Fixed commas