I found the UI pretty confusing. The tutorial was not very useful because there were so many tabs that I just exited out, and the "current quarter" interface was not intuitive. I also didn't realize I could perform research until the execs started complaining.
I'd suggest modeling the UI after a browser, as it's a flow that people are familiar with (tabs at the top, rather than at the side, for one).
The other big thing I noticed was that I wasn't sure what was changing from quarter to quarter. The numbers would change even if I didn't do anything, and it was unclear how my input was being reflected in gameplay.