Thanks for the feedback (and sorry for the late response). I've noted the issues with weapon feedback as a thing that especially needs improvement for the next update, that's come up a few times and I agree it could use a lot of work. Same with adding more obvious highlights for interactible stuff (aside from secrets), I'll have to think of a better solution there.
I'm glad you enjoyed the game though, and thanks for pointing out that sound library, I'll definitely give it a look