I've been playing through this as well. I'm 75% through according to the save file and while it is one of the harder and more punishing 2d games I've played... I've really enjoyed it.
The combat is very much a focus of the game over exploration or movement and is incredibly punishing and although it's not very deep mechanically, it's INCREDIBLY deep strategically.
This game is quite good overall. If I'm honest, far better than I expected.