- You've got an iframe app and you have both horizontal and vertical scrollbars (on mac FF at least). Get rid of them, they drive people insane.
- First time experience is pretty horrid. The "tutorial" is 20 click beast that goes through every aspect of the game at once. Make the game learning process a little more progressive. Don't let me do all 50 things at once. Give me one thing to do, and once I've done it, unlock another 2-3 things I can do.
- User interface, as has been stated already, could use some re-work and some polish. That being said, my old app (Warbook) looks terrible and still got pretty big.
- The virtual goods + advertising model is solid in this space right now. Ignore what other people are saying against it, you're pretty close to a great revenue model. Just remember - people buy virtual goods for two reasons: to "speed up" time and to gain social status.
With all that said, I think the game concept is pretty novel. Hopefully other people find it fun.