Hi, I am unable to play this game for some reason, once I download it. Perhaps because the file you submitted is a .unity file instead of an .exe file?
Viewing post in Colonizer's Castigation jam comments
Yes. Sadly unity files can only be opened in unity. So for us this is unplayable.
Here's the official unity documentation on how to publish/export builds: https://docs.unity3d.com/Manual/PublishingBuilds.html