Actually I think the beginning was where I struggled the most. Some of the early platforming segments with the switch state blocks are pretty precise and I found them fairly difficult because they have the timing aspect to them in addition to just getting the angles right.
Later on I think the platforming was a lot easier but that may just be a result of the enemies not being an issue. (Or maybe I just got used to the physics I am not sure.)
But I would love to check out a full version if this if that ever comes to be.