This is where things really open up for you. Once you've gotten your employees set up, you're free to do as you see fit. You'll have the basics down and it's really a matter of using what resources you have to maximize your final score. Your ultimate goal if at all possible (though it's very hard to do) is make a AAA size MMO game and get 9.5-10 Review score. If you are going to invest in that kind of game then go whole hog and make doubly sure that you get your High Scores in order. Even if you might run the risk of increase +30% over your last score, it'll be well worth it. MMO games stay on the market until you pull them off (click on their chart on the screen).
You can also develop Expansion packs for your MMO which increases the longevity of the game and drastically increases your revenue. After 2 or 3 successful Expansion packs (make sure that they are at least 40 weeks apart from each other and the release of the main game), you'll probably have too much money coming in to know what to do with it. If you can manage that then you are a true master of the game.
Otherwise, do the best you can do. The real challenge here really comes down to consistently delivering a solid game time after time which is what you've been practicing to do. Remember that even if you save, if your company goes under at any point then you can actually restart from the beginning of this level. This will generally set you back to about Y15 which will allow you to try the last half of the game over again.
Good Luck!
