Yeah, I was thinking about that. It's a bit tricky because there's actually three objects involved, but I'll try and add it, together with a few synonyms for STRIKE.
Thanks for the feedback.
I'm as guilty of this as any other author, but my rule of thumb is... if the response to an input includes the EXACT words that a player may have tried then you have to program that input in if possible, otherwise they're going to feel annoyed/cheated. So as the response includes "You strike the flint and...", I think you have to include STRIKE FLINT... even if it's just a response that says "What do you want to light?" or "You create some sparks with the flint. Definitely enough to start a fire."... which lets them know they're proceeding along the right sort of lines.