I had reached titanium, but I believe some of my nuclei were deleted when I fissioned too hard with 4 fissioners, rest lasers. So now I am at 1 Sodium, 1 Cloride, and 1 Potassium, which does not get me nearly as far
I like the concept, but as it is now the maximum upgrades feel a bit rewarding, and I have issues with using the on click gravitational pull (might be only visually that there is no pulsing, but it also feels very weak)
Also, it flashes the between the spanish and english words for how many eV I need to upgrade the nodes.