Can you be a bit more specific? I'm aware that jumping is all kinds of fucked up for some people, which tends to be directly related to FPS.
What version are you playing, web, windows, android? Are you getting consistent 55+ FPS?
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I am on Android, I didn't keep track of my DPS and the most prominent example of what I'm talking about is in the first level on the far right with the three white platforms. I would stand underneath them and just keep jumping over and over until the game randomly decides that this specific jump that was no different from the previous 100 ones would let on the platform.