The pit below can be filled with lava, pointed dripstone, or a high-velocity drop to cause lethal fall damage. The Suffocation Wall (Crusher Trap)
Go into the pit walls, two blocks below the hallway floor level. lovely craft piston trap dungeon
The game is primarily hosted on itch.io for PC users, though some tutorials mention potential availability or methods for Android and iOS. The pit below can be filled with lava,