This is the Retrobooster Demo for Windows. Run the installer. Then go to Start->All Programs->Retrobooster Demo->Retrobooster Demo
You can vote for Retrobooster on Steam Greenlight.
Retrobooster is a 2.5D survival shooter and cave-flyer, focusing on skill-based flying and enemy blasting. Pilot your nimble thrust ship through bizarre worlds littered with vicious enemies. Each new level takes you farther from home and, ultimately, into the deadliest reaches of the galaxy. Retrobooster also has speed-flying challenges, puzzles, juicy monsters, a warped sense of humor, and a healthy dose of bullet hell action. Survive to the end if you can, and use your new flying skills to replay for high scores.
The Greenlight Supershow is a 13-hour webshow event on Twitch that will have live gameplay and discussions with developers. RobotLovesKitty, the makers of Legend of Dungeon, are putting this show together to help a bunch of indie games draw more attention to their Steam Greenlight campaigns. Check the schedule on the Supershow website to see what games you are interested in.
Each game will have a half hour time slot. Retrobooster picked up the 10:30pm slot (Eastern Time). Watch the stream to see what it's all about, and then head over to Retrobooster's Greenlight page to vote for it.