There's a unfair fact in the first 5 levels, you can die easily. i suggest a "one-shot" load game. Only works in the firts 4 levels, and only once.
If you die on floor 1-4, the game respawn you at the start of your death floor.
Result: You can die once, but only to prevent the "accidentally death" when you step a trap and find one or two monsters when you go poorly equipped yet, or something else, and giving the chance of keep playing, prevent a little the multiple die and restart. .. before face the goo
When you step the 5th depth, the Save is destroyed and you can't load the game.