It is hard by the end, but it gradually eases you into it. It also makes failure very comfortable, just spawns you right back, takes very little time at all, so there’s some levels where I just brute-forced my way through with a hundred deaths. But I did hit all necessary jumps for real and next time I was there, I did it first try. Going back to 1a after clearing 7b really felt like when a lvl 100 wizard returns to the starting area, but my in-game power didn’t change this time, it was all pure skill and it felt amazing.