It's a good concept, but the problem is that the game actually runs at 1fps, so input is only detected once per second, when the frame changes. That means you have to mash the spacebar and pray that it gets detected. I think this could be improved by "faking" 1fps and detecting input every actual frame, only making the character jump when tha "fake" frame changes.
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True. It only takes one hit for the spacebar to be detected, but the game is more about learning and thinking ahead to how long it will take for the input to go through. If this were a "proper" game, I would do what you mentioned, but for the jam I was more interested with what I could do under this self-imposed technical limitation.
Thank you for playing and commenting though, I really appreciate it!