This is a game I wrote using C++ and the Allegro game programming library. It's the only one that I actually completed and published online, as a submission to shmup-dev.com's very first programming competition.
(Apologies in advance but it looks like you'd need to log in to view the second link.)
It didn't place that high and the game itself was honestly quite bland in retrospect, but I did receive some good feedback in some of its aspects. The judges were also gracious enough to provide constructive criticism and tips -- definitely something to keep in mind in preparation for a next release, whatever and whenever that may be.
I hesitate on releasing the binary since it was quite a hack job, but in the meantime here's a good run courtesy of Adigun A. Polack.
I also tried to enter the latter competitions, but circumstances always prevented me from producing finished products. Hopefully I'd be able to get more games out the door someday.