I see ya mastered the posing. That's probably the most important bit. One important thing is to not use Paint and GIMP in conjunction, that makes things slow and awkward. You might wanna make the text a bit bigger than 1 pixel too. Keep practicing, then you can do motion blur to show speed, fire, explosions, and lights that all glow, edit in blood effects (and even custom sprite torn body parts), and even things like heat waves. As for the comic itself, the first bit of dialogue sounded really DBZ. Plot hasn't moved too much yet so I can't really comment there, looks like something's about to happen though.