Maybe, I'm just not used to this type of game and the controls, but the thing I most found difficult was climbing the stairs.
I played a mostly pacifist run and didn't use the water one in the proper level, but, assuming killing the king is the end, I think you ought to make that clearer. I'd still be playing if I hadn't got stuck on the bridge.
This is one of the source materials I do recognise and I think it was very well played with.