I don't know what to do with this problem right now. Everything works fine for me. I will probably solve it after the Jam. Thanks for the comment!
I got it working by limiting my monitor to 60Hz. When implementing physics/movement, you need to multiply velocities/forces by the time step of the update function (e.g. Time.deltaTime in unity), otherwise your player's speed will change depending on the game's FPS. Otherwise, the game's got a great concept, well done.