Palisade Runner was a short science fiction story with tower defense as a backbone. Also the predecessor to Colony First!

You have been left behind in the nightly evacuations, you don't have that many options left. You have to face the zombie hordes alone with nothing but a freeze gun and whatever they're authorized to build. You have, however, been promised a costly rescue, but you have to come up with the funds before the horde becomes too much. Can you survive until rescue arrives?

Made with various resources here. See what all you can spot!

Teaser:

https://www.youtube.com/watch?v=HA-tQYY9z6s&feature=youtu.be