I'm not a pure-platformer type of guy, but I found Celeste to be right up my alley. Its greatest strength, besides the pitch-perfect feeling of control over movement, is in how it ties its concept with the execution. Never has a tough game been so kind towards the player, and that's really it, the main key thing: kindness. Kindness and nurture to provide personal growth, either for your own life, or simply for the next jump.