Character jumps higher at 144 fps than at 60 fps- 2d side scroller

No, the game is gonna be a singleplayer story mode 2d side scroller. It’s more like a piece of art than a game I would say ( the soundtrack is also composed and played by me), like a story. However, if you would play it at 60 fps you couldn’t really jump on all the platforms and places a 144 fps player could. That’s the main issue!