The only quibble I have is whether "feeling good" is the right way to describe how evolution has made us choose to engage in exploration/etc. I don't think it's quite as simple as evolution making things that are good for us feel good, and making things that are bad for us feel bad.

There are a bunch of neurotransmitters and hormones that control how we behave. Evolution discourages us from doing things that are bad for us via a range of emotions including things like fear and disgust (not just "feeling bad"). Evolution also encourages us to do, or keep on doing, things that are good for us via a range of emotions such as enjoyment (this is a tasty fruit), contentment (this feels nice - I'll keep doing it) to curiosity, again not just "feeling good". I think curiosity and exploration (which may lead to learning and discovery, which are good for us) are based around attention and focus ... rather than feeling good, it feels interesting.