It's a bit buggy spaces don't work right and any entered text will advance even if it's not a valid option. Since I used a space in one of the options the first time I played I never even got to chose some of the choices and didn't realize till several attempts later. It looks like it closes/crashes when you either run out of money or fail to do something too many times :(.
Other than that I think your on the right track but adding some randomness to the options or changing what options you can do at certain times could make things more interesting.