Hi MrMatt,
5 enemies aren't possible to get on a floor, only from floor 3 onwards in Ravenna's game you can get 4 enemies at max.
Ravenna is can be defeated as the player gains power through the floors. you could take a rest on floor 3 but be careful as the monsters might ambush you.
The pigs can be killed if your above 400 height and just Squash them
For Ma'riskia you have to stay calm and in the middle only move when something spawns in your way. For V0.3 I added a (beta easy mode) for test and Ma'riskia is one of them getting hit.
Correct Alisa will drain you if you get hit, that's most crucial thing to avoid in her game.
For Ma'riskia map I indeed add move out from spawn location
As they can spawn on top of you and instantly make you lose
The fake key is hidden item(you can't see it in the inventory) for Lyra's quest but she doesn't say anything about it, perhaps it's not the right key.
Does these answer your questions?