I pretty much love everything about it. I'm usually pretty pessimistic on Kickstarter funded games (because I got burned by one) and pick and choose what I fund extremely carefully, but after reading through the Yooka-Laylee kickstarter (more or less as soon as it launched, I was watching the timer on the site) I dropped down for a copy. And then when it seemed like a sure thing, I upped my pledge to £90.
I'm fond of the music (both tracks) especially, and the art direction. Has a bit of nostalgia to it, I suppose, but there's also something very fresh feeling.