Though i whould mention this
Victory Girl
hyakkidour4n.deviantart.com/art/Victory-...-Full-beta-110900825
This a free flash game on deviant art that i saw years ago- this is a video game about a supergirl flying around destroying an alien invasion. What i really like about it is the music(which loading it up the other day i still realize i rememeber as being great) and the story, which is suprisingly deep for a flash game of any kind-it has some ideas you don't see often in this kind of fiction and does it well. Also some not bad art. The gameplay-well its okay. the creator has tweaked the game a lot over the years but i think this is the best version.
also Though i would highight this flash game.
www.agame.com/game/supergirl-go
Warning: This is a knockoff game of Jetpack Joy Ride- Which is itself a variation of Canabalt....which is kind of a variation of....
well its not the most original Game ever. But it is in part of kind of cute and its free and has a little bits that made me smile.