How to play.
Place walls such that:

• The total number of walls in each row and column are as indicated.
• Empty squares must all be connected as a walkable path.
• Monsters are always at dead-ends, all dead-ends have monsters.
• Each treasure is in a 3x3 room, with exactly one entrance. There are no other rooms (areas without walls 2x2 or larger).

What is this?

This is a fan reproduction of Dungeons and Diagrams, a sub-game in Zachtronics' Last Call BBS

The gameplay is the same, but the puzzles are different!