I'm havin lagg issues, i tried disabling the graphics-option, however, i feel the major lagg comes from the background. Would love a disable for that =)
The knowledge upgrades seem really slow, especially if you have to research in a fixed order. Iodite [I] was impossible to obtain in the beginning, in later stages there was no farm at all required for elements unlocked faaaar later. A slow rise of price might be more enjoyable.