There are a few limitations on what features you can pile into a game. First is the position of the slider. If the slider is not positioned high enough, the next to the function name on the right (in this case, "Graphics") you will see a percentage. In that case you need to move the slider up until the percentage disappears. On the left hand side you have your employee workload and it might be impossible to program all the features without overworking the employee. My understanding is that the game will let you overwork employees but they will not produce as well.
Finally, it might be impossible to add all the features that you want, even with the slider at its maximum. In that case you need a better employee with high tech, design and probably expert training. This will happen if you are trying to add 3D V4 and Stereoscopic 3D.