Wow! just played the demo, that was amazing! The art and animations are really nice and I especially like how you mixed the stile of a RPG with a 2d platformer. I really like the custom language and all the sound effects. The only real problems I had with it were all things that had to do with controls. I really think you should add a way to customize what buttons do what and some presets for using a keyboard and controller. Also it would be nice if the player didn't change speed for seemingly no reason.
other than that great game and keep up the good work!