Pretty difficult! I managed to make to the big area with all fairies, but having to go all the way back after you die is a little frustrating. If it had a couple of checkpoints it would be more manageable, though at least enemies don't respawn.
I like Medicine's limited action set. I feel it would be better if they were more spammable, but they force you to be creative with how you approach enemies. Pressing O + P at the same time makes for a good directed shot, for example.