I don't think i ever intentionally purchased a really hard game. I enjoyed Hollow Knight even though it is quite tough because the "easy" ending, which in my mind is still quite tough is much MUCH easier than the other 2 endings. One of those is just for crazy hardcore people. It is good that they have all 3 in the same game though.
RE: Blast Rush LS Launches onto Steam Bringing Bullet Hell Action to PC Gamers