The second boss level, was amusing but was nevertheless pointless. I don't know if there was any indication that there was a pattern involved when going up the staircase, but it always felt like it was completely random in its ordering. Once you reach the actual boss, it kinds of feels like you were cheated, wondering to yourself: "that's it?".
That was kinda the point, that the stairs were the actual boss, not the ghost. But yeah, it was pretty tiring after the first few falls.