What a nice way to kill time on a cold weekend! Simple and fun metroidvania with great atmosphere, plenty of content, and fun abilities, and very competently designed. The story is collected in pages throughout the game and offers a pretty deep history of the world you are on.
The ending felt abruptly ended, but that was okay, too. In this case, it was the journey that really mattered, and I had fun the entire time playing this.
As another poster commented, being able to swap your map from detailed to squares was a nice touch. I personally liked the square look the most as it was easier to track where I needed to go back to, but the detailed look gave it more depth.