I just bought CRUMB on my windows pc, I then tried to download it on my mac, when I open it on my mac, it freezes, doesn't allow keyboard input, and flickers a pink rectangle across the window.
Ditto. This is on a MacStudio M1 with 2 4K displays (3840x2160), running macOS 12.6 (Monterey). App launches and while in the foreground (full screen or windowed) the main display draws with toolbar, etc., and then a big, flickering magenta square in the middle of the screen. The in-window controls are inop, but the app's menubar responds to events to resize the window or quit. The problem is present regardless of other apps running, fresh reboot, etc.
Ditto. This is on a MacStudio M1 with 2 4K displays (3840x2160), running macOS 12.6 (Monterey). App launches and while in the foreground (full screen or windowed) the main display draws with toolbar, etc., and then a big, flickering magenta square in the middle of the screen. The in-window controls are inop, but the app's menubar responds to events to resize the window or quit. The problem is present regardless of other apps running, fresh reboot, etc.