Which game engine have you used?
Viewing post in Lenna's Inception comments
1 year ago(+1)
LI uses a custom engine made in Java with pieces of Lightweight Java Game Library, the engine Minecraft uses. [Link]
I guess it's 32-bit and that's why it won't work on later macOS versions?
I'm a Unity developer but I could attempt a 64-bit build of this game if you'd like.