You only have one file (for each build) and it's for Windows.
You have to manually switch export setting to Mac and build for Mac separately.
Thanks! Just played it.
You most likely used old Unity input system. Just letting you know it's gamepad support is screwed up on Mac. You need to learn the new input system for better gamepad support (although some people with our game reported broken gamepad as well, but it worked for the majority:)