I accept no responsibility for your dirty mind, that is a raised knee under a blanket
I see... Well, if you know what it is supposed to be, then it is clearly visible where the legs are. But at first glance for someone who does not know what it is supposed to be, there is not enough information that indicates a leg. And being a SFW game from a creator with a whole list of NSFW games surely does not help neither to make people think of a leg first, haha.
I think it would have been more obvious if the picture was not from a PoV perspective but from the left shoulder. This would allow to add some significant lines below the knee that would make it obvious that it is a leg.
But yea, from PoV, all you can see is a phallus ,,of some kind" and no hip line.