I couldn't run into that issue myslef while playing and didn't get anybody else running into that error so I don't know how to fix it for now. I'll try reuploading the game when the jam is over. Thanks for trying to play the game.
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I actually just retried and had no issues, so the fault may have been on my end.
It's a neat game! Had some trouble with the movement keys, but I liked how clearly telegraphed everything was. I knew immediately that the enemies were enemies, and knew exactly which version of the player I was, just based on the visuals. That clarity is important and I thought the game did a good job with it.