First, genuinely, thanks for the feedback, I wouldn't have asked if I thought I didn't need it.
I take the point about the excess "scenery" objects maybe being distracting. There's a puzzle or two later on where the act of looking in the right circumstance is what triggers progress, so I wanted to put some scenery around to prime the player a bit, but it may have had the demotivating effect of making it unrewarding that early on. I'll need to re-examine that.
The 2-words/6-words thing as well, I was trying to keep things as minimal as possible, where longer responses were more to emphasize significant objects/events, but this maybe just ends up coming off as undirected or indecisive on my part.
What's actually worrying me is I hadn't even considered climbing the fence as an option, or how much it inadvertantly gates off progress so early on. The solution I have there presently is to "Search" the fence for a hole to enter the cave through, but nothing really prompts that as a verb now I think about it. There had been a prior reason for it involving nearby wirecutters, but I'd scrapped that puzzle without realizing it makes the fence a sort of meaningless frustration now. I may end up scrapping the fence entirely now it serves no point.