Thanks for checking it out! Do you mean they should be faster / jump higher / accelerate faster? Or, if you're talking about the rising platform in the third level, I know about the way characters can't jump when on top of it, but I have yet to understand why that happens... v_v
I already implement coyote time by default in every platformer of mine (although honestly, I didn't know it had a name so I just called it "jump grace period"; the more you know~). I'm not sure what exactly you mean by helping players reach platforms that are a bit higher but I'm using capsule collision shapes instead of rectangle ones here, which should have helped. The fact that you thought these things weren't present tells me that I should probably increase their effect, though... Thanks for the feedback!