I fight lost wars, see light, fear sight
I open my mind, need flesh, fear mine
The biggest problem that I encountered is that the players block the doorway and wait for the monsters to come to them one by one since everybody can only move and melee attack horizontally or vertically.
Why would the DM send the monsters in a single file straight towards the Adventurers?
Surely the player blocking the doorway would be targeted by enemies sneaking in from either side of the wall?