I find the "map" hard to read, with the same colour for all the numbers and then the different sign for when either you marked or clicked the zombie. It's a lot for too small squares, so that it pushes us to do mistakes.
But as a minesweeper addict, that is a good idea, that just need improvement
 "Monsters' Den Chronicles"){kind=icon}
 "ZombieSweeper"){kind=icon}