@tyson-ranes First of all, what a wonderful illustration. I really love how unique the characters look and the idea as well. I can't wait to see how you polish this off. So I totally agree with @Leontine, the composition looks much stronger with the lions cage on the right. I get a grander sense of the surroundings and better sense of this area being populated . Plus it creates a great central focus on the mouse.
However I would use B as the separation creates a clearer silhouette of your leading character. One more thing I would edit is the hand placement of the mouse. I didn't really get that he was doing a "neener neener" at first because the tongue looked like a pinky at first. You can get the same idea while playing with his hand/arm placement. Heres a quick paint-over but I'd say the shape of your silhouette isn't as strong as it could be. Lasso the little guy, change to black and see if you still know what animal he is.
Awesome awesome awesome start!