Ergh
From the looks of what you have, the game seems kinda clunky. If you are not really relying on graphics for a game, than story, fluidity and likability need to pick up the slack. Really smooth movement and controller recognition can help a game immensely but that will only go so far. It did not look like you had a lot of customization or items to pick for your character. I don't know the back story of the character.
Although Alien Hominid, Castle Crashers were very simple games with limited graphics, they played really smoothly, had funny and likable stories/characters and an overall personality that resonated from it. Time and thought was put into them and not just a means to make a quick buck. I kinda see what your going for, but this needs a lot more polishing before I would ever buy it from the xbox arcade.