Gah, this is unfortunate! The engine I use doesn't have support for alternate keyboard layouts, so I'd have to re-code the whole game to fix it cohesively. I've been adding alternate inputs as a workaround as I learn about them. Ctrl+M opens manual, Ctrl+L toggles lightpearl, but staircases is a new one.
I'll let you know next time I update, I'll add alternative keybinds for climbing. Sorry for the inconvenience!