Empowered hunger was confusing to me as I thought that having 0% hunger was optimal. I think something like "filling your hunger bar empowers your XP and Gold gains" might be clearer.
The skill trees are a bit unclear regarding which direction a prerequisite is. A little arrow pointing from the requirement would help.
Why would I ever want to set the bubble sell percentage below 100%?
When you unlock researcher, it fills the gap with new upgrades.
I'm at might 66 and it's still at 0, when does it kick in?
EDIT: As it turns out, 70
Quality Ink says it reduces research speed by 50%. It should say that it reduces research time by 50%
While you're making minor fixes. There's a typo in a couple of places, enyclopedia -> encyclopedia
I think the XP gain for researcher is bugged. It says 1.45k on the level up screen and 144k on the stats page.
