I added a moving platform. Tutorial is finished. So now the player is on their own.

player.gd

@@ -11,6 +11,9 @@ const JUMP_VELOCITY = -850.0
 var alive = true
 var can_move = true
 
+func _ready() -> void:
+	floor_snap_length = 12
+
 func _physics_process(delta: float) -> void:
 	if !alive:
 		return