Miki the Fighting Girl by AuSYSTEM is a work in progress that shows some promise. What we have here are basic special moves commonly found in other fighting games, with the Z, X and C keys assigned as attack buttons. Currently has only three characters in it's lineup.

Download links for every single version ever released can be found just under the game screenshots, although you only really need the latest iteration.

Name: Miki the Fighting Girl
Developer: AuSYSTEM
Category: Action
Type: Freeware
Size: 10MB