I've let too much time pass between playing this and writing my review, and I'm horrible about taking notes on my experience, so I won't try to articulate at any length something in depth. So in short:

It's a cute game that kind of feels like the generic version of the big studio "polished, well reviewed, might be nominated for but would never win GOTY" but on an indie scale. It offers no surprises whatsoever, is so pick up and play if you're familiar with isometric controls, has basically no difficulty in it at all, and has a few memeable moments of quaintness. It's so easy to consume that Death's Door could be administered via IV.