vertical line? unless you mean going downwards no idea what u on about, the first few fights are practically impossible and the rest are really easy
Well, for me it's the opposite. I can reliably kill the first few enemies and then on the second floor before I know it I'm quite literally fighting 15 worms and one of my full health characters died on the first enemy turn. Seriously though, the floors go from having to fight 5 ⭐ battles at most to having to fight like,,, 8 ⭐ battles on average.