Your niece has excellent taste in superheroes.
Not quite your strongest work, but still excellent. Nice redesign of ol' Webhead, and of course your composition is second to none. Nice atmospheric effects too, though the sparks (?) all seem to be in the same vertical plane, which makes them look flat. You might try to layer them between and behind the characters... to the extent that that is possible given your tools, anyway. Not too sure about the pixel dot stars (?) either.