Funny idea for a game where a fox-like creature is hunting humans XD. For a platform game, I always suggest setting gravity and jump power to much higher values. Having gravity twice as high as jump power (or even more) makes it feel much better. I've included a video with a short presentation of what I mean.
https://drive.google.com/file/d/1vuus8U2nBLRoIymgM7llYIIUXYIZp--j/view?usp=shari...