Thanks for the feedback man, it seems a lot of people are thrown off at first by the lack of normal movement. Obviously since I made the game I was used to using the somersault kick to move around, but it's not immediately intuitive.
In terms of a more fully fledged version, I was planning on using a similar mechanic to this in a full RPG at some point (obviously with more freedom of control) where encounters with enemies put you into a Mortal Kombat style fight.