Sorry to be the one to say this, but your demo isn't working.
First of all, when I downloaded the demo, it was automatically deleted by my virus scanner. That's not very good. I don't know what you used to package your game, but you should really just put all the files in a .zip instead.
Then, the game crashed when I booted it. It said "RPGVXAce RTP is required to run this game".
The battle system you described sounds awesome, but I can't try it out. How can this be fixed?