Woo, fighting spirit! His pose sure packs some punch in that macho, "gonna kick your ass"-way. 'course, could be also that his glove is something that smashes people's heads into gore nuclear explosions.

Still, nice work with the character but the background is a bit too quickly done. At least it looks like it. Think of a concept there and you'll do great! Here the red area could have been a circle instead of a square...