Take petite Black Rock Shooter (designed by CHANxCO) for a spin as she battles against the denizens of Sexy Planet. BRS is after treasure, and she'll knock down everyone in her path!

This game, created by Imageepoch, is free and features plenty of customization options and in-app purchases to enhance your gameplay. 

Each stage has a sexy denizen at the end that you need to take down, and BRS has various weapon/bullet options with which to do so. After beating each boss, you get treasure, bonuses and all that good stuff. 

The game does sound rather neat, so I'll go ahead and run a preview here if I'm able to download it. According to the main page, it's been released and is available at the App Store, but I haven't been able to find it on my device despite searching in both English and Japanese. While it may be the case that they've submitted the app for review and it hasn't actually gone live yet, it may also be region-locked or something. More on this as I do more research.

Check out more pictures and screenshots over at Siliconera, and here's a link to the game's main webpage. According to ANN, this has been made available as a browser-based game on Nico Nico Douga previously as well. 

[4Gamer.net, via ANN]