Glad you liked it, spawning the first monster on the edge of what the player could see was intentional I'm glad that moment worked.
The code to read what the map editor outputs in the gamejam version is broken and not really implemented, it was something I threw together in the hopes that the other non-coders on the team could easily drop assets into the game, but unfortunately it didn't quite get finished in that way. Though of course feel free to go through and use any of the code.