Yeah. I don't think it's actually challenging "hard". I just miscalculated the difficulty. As my skill level is the one being used to playtest this, you need to be within a very specific range of skill level. Once it's just a bit lower, it's hard and once your skill level is a bit higher, it's monotonously easy.
I'm actually making another patch(? idk) for this so I'm trying to make that difficulty scalable. I get the feeling that it's even harder than the original but at least it's more consistent... I think.