Celeste
Beat stages 1-3 B-Sides, beat the Core, got Heart of the Mountain.
It's a damn fine game, and I'm sure that people better than me at these didn't have the issue, but one minor complaint I have that both 3-B and Core had, notable when doing them twice in a row, was the combination of having moving obstacles as well as extremely tight timings. IOW, say there's some sort of procession of a spikes equivalent that just goes back and forth. If you're in a safe spot, you can just time when to jump through it. Maybe you get it wrong a few times, but it's clearly your fault or a learning experience. Over in the other corner, suppose there's some intricate jump where you're bouncing across three scenes with no respite and attempting to slow down will just mean losing too much momentum and plummeting to your doom. Okay, that's exciting and fine too. However, combine them, and you get potential frustration. There would be times where I damn well knew I was jumping to my death but had no choice because slowing down would be death too, so I guess I'm just jumping and hoping the obstacle isn't in the way and timings all line up for me? I'm sure speedrunners have things like the *initial* time of departure really down pat to mitigate this, but it's a bit frustrating for me because I don't feel like I have a lot of agency in those deaths. (On the other hand, these are basically challenge stages, so it's my own damn fault for attempting 'em.)
But, to be clear, it's more that it's easier to talk about nitpicks than it is to talk about good stuff. This was pretty amazing, highly recommended.
Also, patch just came out recently for PC, hopefully PS4 gets it soon! Also the speedrun.com leaderboard for this game seems to have a new world record every day. Intense stuff.