So I JUST discovered this game. Holy !@#$. This is amazing. It also seems like it could take a REALLY LONG TIME. Either way, I've got a new hotness.
It can take a very long time. But, you don't have to play games all the way through. It also has no "win" condition, so you can set goals for yourself then start a new game after completing your goals.
Also, if you have any experience with gfx files/modding see my other thread. I need help to make it work.