Door Simulator 2015
A downloadable Door Simulator for Windows, macOS, and Linux
I wanted to make a first person game that would say something about FPSs. But I ran out of both time and faith that I'd be able to pull off my message well. So I added more doors instead.
Updated 9/15:
Added a secret ending.
Added Mac and Linux versions too, but I can't test them. So here's hoping they work.