Celeste clone; just has left/right movement, jumping, and wall-jumping. Movement momentum can be a bit finicky, but the level design still manages to be challenging without being overbearing. The game is a bit nonlinear, but due to its short length, that pretty much just means two paths that loop back in on themselves. Unlike Celeste and many of its clones, there’s no set level end; the goal is to collect what would be the optional items in other Celeste clones, then return back to the start, and the ending you get depends on how many of them you got. The game never explicitly says that you have X/X crystal orbs, nor does it even have some sort of cue for when you get them all, but again, due to its short length, it’s not hard to tell when you’ve got them all and can go back to get the best ending.

Also, it’s free, so I can recommend it. You can play it here: https://creamsicle42.itch.io/gravity-acolyte