When I try to open this on my mac (M1, Ventura 13.0.1), I get the message '"discone" is damaged and can't be opened. You should move it to the Trash.'
Installing through the app sort of works -- the game starts up, and I see some vertical black pillars against a purple sky. There is a gray cube. No cursor. Mouse doesn't seem to do anything. Escape gives me a screen labeled "discone" with a quote from the narrator, and a settings button which does nothing when I click on it. Escape again takes me back to the pillars. Keys other than escape do nothing.