Don't change the category. It is not necessary but the 'straightforward' part is still on for the reason you said. In most of the moves there is only one way.
I must admit I'm surprised you found it straightforward. I guess from the standpoint of "there's only one way to move" at each step. I'll wait to see what other people think before I change the category yet, though.
P.S. I've made a new level of this type that I think you'll find a bit less straightforward... ;)