Interesting concept for a combat system. Having a character revolve around and protect another character was really cool; it's kind of like a reverse escort mission. It was also cool how you could change the size of the ring, with the size affecting your movement speed. More visual feedback on the protector character's melee attack would have been appreciated.
I think something about the arrow/potion mechanic is poorly explained and/or broken. Several times I tried to make water arrows to put out the steam, was somehow unable to, and then ran out of energy needed to make more. This was worsened by the fact that you're locked out of the area with enemies when you need to make water arrows and therefore can't get more energy, which softlocks you from progressing any further.