The Adventures of Superhero Girl

The Adventures of Superhero Girl is a webcomic by Faith Erin Hicks, who previously created Demonology 101.

Superhero Girl (or S.H.G) tries her best to do good but is often overshadowed by her older brother, Kevin, who is more popular and gets lots of money though sponsorship.

This webcomic contains example of

 * At Arms Length: When did freakishly long arms become your super power? (here)
 * Clark Kenting: Parodied with Spectacle. She's a reverse Clark Kent -- she wears glasses as part of her superhero costume, and takes them off in her civilian identity.
 * Clothes Make the Legend: Averted, S.H.G. has been through plenty of costume changes in her life.
 * Everyone Calls Him "Barkeep": The heroine's real name has never been revealed. She's only ever referred to as "Superhero Girl". Her roommate is also as yet unnamed.
 * Evil Costume Switch: Parodied; S.H.G has a bad hair day and wears a hoodie, noting that it makes her look like a Sith Lord. Suddenly everybody thinks she's evil.
 * Eye Beams: S.H.G has them; Kevin apparently doesn't.
 * Flying Brick: Kevin, Spectacle and S.H.G (minus the flying part).
 * Most Definitely Not a Superhero: S.H.G sometimes resorts to this.
 * Ninja: Lots of them as generic mooks.
 * Not Quite Flight: S.H.G cannot fly, but she can jump over 'any building under 11 stories'.
 * Only Known By Their Nickname: Superhero Girl "It's what everybody calls me"
 * Shrink Ray: here
 * Secret Identity: S.H.G doesn't do a very good job at it but she's getting better!
 * Stock Superhero Day Jobs: Several kinds, S.H.G is a freelance bum, Kevin is a career superhero and Spectacle is a rich socialite with too much time on her hands.
 * Super Hero Origin: Subverted, S.H.G doesn't have a horrible back story for why she became a superhero and some of the local citizens think this doesn't make her a real hero.
 * Super Strength: Part of S.H.G's powers
 * Villains Out Shopping: Done literally
 * Villains Out Shopping: Done literally