This is the Retrobooster Demo 0.6.5-1 for Windows. Run the installer. Then go to Start->All Programs->Retrobooster Demo->Retrobooster Demo
When evil aliens invade the galaxy, it is up to you and your fleet of decommissioned starfighters to drive them back. Pilot your humble thrust ship through tense battles and tight spaces. Hone your piloting skills, rescue survivors, blow up gobs of baddies, witness the horrors that lurk in the darkest corners of the galaxy, and make it out alive.
Retrobooster is a 2.5D survival shooter and cave-flyer, focusing on skill-based flying and enemy blasting. It combines old school gameplay with contemporary graphics and audio. Retrobooster also has speed-flying challenges, various weapons, 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.
You can vote for Retrobooster on Steam Greenlight.
Retrobooster has its first playable demo for Windows and Linux. The full game is about two-thirds through development, so the demo will be improved as the game becomes more complete. Fortunately, Indie DB has really fast servers so you can download the demo here a lot faster than from my own webserver.
Visit the Retrobooster forum if you want to discuss the demo. I'm really interested in getting some feedback to help make it a better game.