I love this idea and most of the implementation. The problem is that the game lags so much. I feel like that might be why it's impossible for me to turn around.
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There are definitely some optimizations that could be made to the audio code in the game. I'm pretty sure that's responsible for any lag you're experiencing. It's also noteworthy that the character doesn't jump immediately when you tap the spacebar. This is because the game has to compute for a moment whether or not you tapped or held the button. That may have contributed to the lagginess you experienced, but that was actually intentional.