IT’S NOT! You just have to follow the README in the game folder. I feel so silly having trashed all those Gamemaker games when the fix was so simple -- not even any terminal commands — just **drag to Applications**. There are a lot of workarounds we gamers can do on our side to hitches opening Mac ports (like CHMOD to fix permissions, UPX for unpacking, right-click opening and okaying in Security for unknown devs), and if all that doesn’t work, virtualize with Parallels/Wine or boot to a Linux/Windows partition. Minidoom secrets are incredible homage to the entire genre of 2D platform history!