I'm playing Celeste! My fingers and getting destroyed with having to press multiple keys at the same time... It really feels like a controller game, but I will persevere, I think. Playing a chapter per session seems doable.
Tring to think of the last time I played a 2d platformer and I'm not really coming up with anything... Uh, SuperTux. I played a bit of that since it came with some state-sponsored computers for students like my sister.
It's surprising because I don't usually play this genre. I don't know if they're all like this, but I'm pretty sure Celeste is a puzzle game, where you first solve how you can reach a strawberry, for instance, then you spend 10 minutes trying to execute it and dying a couple dozen times.
Seeing by the amount of people that finished it, I'll presume it is quite doable. It's probably all the extras that'll destroy a person. I think I'll finish, at least.
It reminds me of the other platformer I've played in my life: A Hat in Time, which is the best game ever.