This game looks really cool but I'm not sure if it runs on my mac since steam doesn't label it as requiring a 64-bit processor. I was wondering if anyone knows if it runs or if there are plans to port the game to a 64-bit version?

I'm running it on Monterey on my M1 Macbook Air right now and it runs great!

The Mac build is an unsigned 64-bit intel build. It should continue to work on Apple's ARM M1/M2/etc processors as long as they keep Rosetta on the systems. Most of Verdant Skies was originally made on a Mac!