Pretty fun, small game :) the mage is most important to protect, because he cannot kill himself, the dynamic between characters is interesting, but it would be better if characters didn't swap so often and if there was some kind of indication of when it's going to happen. You could also work on showing which character you're switching to - maybe some kind of small ghost quickly flying off the previous one and into the next one? :) I think it could look dope if done well.