Apologies, everyone! I only uploaded a build of the game for Windows. I'll be uploading a copy of the build for Mac OS and Linux shortly. You can view and download them on the game's main page. (Not this submission page, the one for the game itself)
Edit: It seems they've appeared on the game jam page as well. Apologies for the inconvenience! Please let me know if the Linux build has issues, since I don't know anyone with Linux and don't feel like installing a Linux VM to test it. :/