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The Floor is Lava

The floor outside of buildings is "lava".
Based on AmbiguousAmphibian's The Floor is Lava series on YouTube.

If you walk on the ground(Grass, Streets, etc.) outside of a building it will spontaneously combust.
You can use construction to move between buildings.
At the start of a new game, the player is given a saw and a hammer.

Feel free to let me know if you find any bugs or issues. :)

It is made for Build 41 and works on Build 40 although it seems like you don't die as quickly from fire in Build 40.

Workshop ID: 2549907069
Mod ID: TFIL