It is a great game. The only thing holding it back a bit for me is the map system. The map doesn't get revealed as you explore a place like in Metroid or some Castlevanias. You have to stumble around in the dark until you find a bench where you sit down and then the map for where you went gets revealed to you. It was very frustrating at times.
I don't see this as an issue at all, if anything I think it makes the game more exciting. Going into a new area always feels just that bit more scary because of that fear of getting lost without a map to guide you, and it's such a big relief when you hear the cartographer's music and go after him. I just think it's one of many elements unique to Hollow Knight that make the game so special and awesome.
Not sure why the necrobump, though.