Well, now I'm kinda interested in what items you mean, I can give you more hints if you contact me through a direct message (if such a thing exists on this site) or https://twitter.com/ApapappaGames or email@example.com. :)
Yeah, the field exploration thing is something like what I was thinking.
I noticed that it was dark on another youtube video aswell, not really sure what is causing this but I'm guessing it has to do with shaders and graphics cards outputting different results.
Anyway, glad you seem to like the game! :)