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One drawing which I did yesterday
You could have used the composition to suggest danger better. For example, you haven't paid much thought to the position of the ball, or to using perspective to work with the girl/ball line. And the glowing eyes are just scattered randomly around, not focused on the girl, which makes them scenery rather than an element of the plot.
Keep working on basic composition and perspective. Using lots of textured Photoshop brushes won't save you from a poor choice in those.