puzzle 37229 should be stopped one move earlier

This puzzle should be stopped one move earlier - http://en.lichess.org/training/37229

there is no point in forcing the last king move

Well, yeah there's kinda no point but you gotta move out in check. I guess it's true that all four squares the king goes to, the puzzle doesn't fail you, so there's not much of a challenge in that move, but that just goes to reveal how there's not much point allowing multiple good moves.