Once I spent all my money, the game went gray and crashed...
Well yeah, that's the point of the game, you need to keep your money above 0
I see, I assumed that I'd be allowed to go to 0, just not go into debt or anything.
Yeah, I couldn't decide if it should be 0 or -1 where you fail, sorry theres no loose screen, its just removing the main scene when the money equals 0 haha