I can't seem to figure out how to get past the first level. Seems like it's not jumping high enough?
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I saw you posted your code on github so I took a quick look. I don't know if this is the cause or not, but could it be that the random offsets you're applying to the player position are affecting the jump? Only reason I think it might be related is because the jump does seem to go full height sometimes, so I could see the issue being tied to a random variable.