Without the ability to properly test the game with other people it can be hard for us to judge the difficulty when we think it is easy so it is safe to say you probably don't have dumb fingers haha
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Yeah, I completely feel you on that, haha! There truly isn't enough time to playtest in a 48 hour jam, so I definitely don't hold it against you that there was one jump that was much harder to execute than the rest of the game!
Overall, I think this game is absolutely brilliant, I'd pay full price for a full length version.