The game's difficulty comes mainly from: A) old style jump controls (ie. you can't change trajectory once in the air, except with the double jump), B) somewhat newbie-hostile level design that results in plenty of trial-and-error gameplay, C) unforgiving health system where you lose gear when you take damage, and D) long distances between checkpoints.

And yet... this isn't as rage-inducing as I would've expected.

It kind of reminds me of Celeste, in the way that you first need to figure out a sequence of actions, and then execute it with little room for improvization or mistakes. Also in the way that you will die a lot. The difference is that Celeste has waaay more checkpoints, an interesting story, and actually enjoyable fluid movement.

While I've never beaten this and have uninstalled it several times, it has never made me go "I'm never playing this again".