My feelings are kinda mixed on this one.
I will talk about the negatives first.
Fundamentally, this is really good platformer, unsurprising considering who it is from, but this game is also old-ish, being originally from 2015.
While its not always the rule, I feel that older platformers are..well..much more difficult in a frustrating way.
The game is played in locations/stages, meaning you have an over-world and there, stages you enter into, with you being able to select difficulty before every stage, you can only save in this over-world..meaning that you need to complete the prologue before you have any sort of save.
As for the two difficulties, as you would expect these reflect how tough the enemies are, how much health you replenish and so on..but that isn't really the main difficulty of the game..that would be the control scheme.
While I don't hate it, as it is genuinely interesting, the fact that you have to manually reload after your magazine runs out means you have to learn the game, get used to it. The game also throws all sorts of mechanics at you, vines you have to grab and hold, and so on. I know I know, having to play a game to get better at it, what a novelty, but I am unsure how many people are looking for that.
You are punished for your mistakes..if you die, you have two options, retry or game over, if you press retry you will start again at the start of the room you died in, but with the health you entered.
Meaning, as you can't easily heal yourself, you can end essentially with you back against the wall, unable to complete a room, re-spawning with low health.
On the other hand, playing on easy feels a bit too easy, you get a lot of health, heal a lot, playing on it felt trivial.
Which makes one wonder how to play..I would cast my vote for normal, learning the mechanics and enjoying the game as it was made.
The art is good, worth it, if you have the patience to genuinely play a platformer and not just breeze thru it.
However, there is fully unlocked save included directly in the game, so..you can just pop that bad boy in and look thru the gallery.
Good game, losing one star for some of its design choices, like saving very rarely, and for the occasional gore.