Personally I found trading much more fun. I think it would be reasonably easy to make a good game on an expanded concept of this. Maybe.... even... with Kreds.
Wow. I made almost the exact same comment about saving as the top one (10K+) here, for another game, and it got modded -17. Kong, you're a crazy, random beast.
There should be a medical variant of this. Where patients come in, you have to mix and administer the anesthesia, and then you give colonoscopies n stuff.