Warning: mild spoilers

Pretty good, would be four stars, but minus one star for basically being on rails. There's one point where if you make the right choice you can get additional content but you'll always get the same ending no matter what. I don't necessarily expect several fully fleshed out alternate endings (although a path romancing the human girl and choosing not to go with the imp would be nice), but there are some places where they could easily have made it a bad end, some of which wouldn't even need extra artwork (and it would be at most one more static image per bad end even if they did illustrate them).

In the end, despite the multiple dialog choices, this doesn't really feel any different than a completely linear animated graphic novel, and I think that it might have been better if they'd gone with that approach and only included the one choice that really does change anything.