There's unfortunately a fairly high chance of spawning on an exploding barrel and dying instantly. It happened to me twice. Also, the method of getting into the biome should probably be changed, since it's nearly impossible to prevent the ladder from being destroyed while looping (maybe change it to be an E button press instead?).
Otherwise a very very cool mod, it introduces a unique flavor that meshes flawlessly with the rest of the game. The enemies added are super interesting and fair to fight, while simultaneously being extremely lethal if handled incorrectly no matter how powerful you are at the time (unless you have Boiling Veins of course). Very well designed overall. I'm quite excited for a potential update.