The cart should be longer. Feels weird that Squee is basically tapping his foot on air, and it messes with the model's center. The sign should be changed too - we expect a flag to move in the wind, not stand there lifelessly like a plastic prop. Spleen's beard also looks a little too much like a fake beard.

SInce this goes with the arcana cannon, you should include some screenshots of this set combined with the cannon.