Os 10.13 and above is the only requirement (Metal is needed) for it to run the game. I am the one who needs to put enough graphics settings so that even laptops can run the game. I didn't say it would happen tomorrow, but as I said, I will do everything I can to make it work! ♥
Nope, I'm a one-man band here, I can't list system requirements for every new version for every platform haha. The last version (0.3.9) should now support Intel Graphics for example, which wasn't the case prior, I'm doing my best to make it work for most people!
The best way to see if it works on a PC is to try the latest public version since it works as a demo too!