Well personally, I think the plot needs to be expanded. like maybe one praty emember wants to escape, but the other one likes the coloseum type show. Also adding a character that's kind of like a rival would be a good idea.
Personally I think the plot is too thin. Expand the plot, THEN work on the maps.
The list of priorities for RPG Maker games is like this.
1. Make sure the game is fun! (No matter how innovative, or how nice your maps look, no one will play a boring game.)
2. Have at least a passable story. (Don't do something like this, omg we have to buy tacos and stop evil lord modly butt for no reason.)
3. Maps have to be passable. (I.E. They don't look 100% half *ssed.)