ooo -- this is super cool and satisfying -- hadn't even thought of something like this, nice work! One recommendation I'd make for iteration is to perhaps lock movement on the X and Z axis while climbing the ladder/moving vertically on the Y-axis -- that way it would feel more like a ladder (and you wouldn't accidentally fall off on the right/left) vs. a rock wall (you could also have a version that still functions with the left/right for a rock wall/vines/etc -- another surface where you'd expect lateral movement vs. vertical alone). Super cool regardless though!