You work in a secret lab to obtain new energy sources. By means of an atom-smasher you unite similar atoms into molecules. Molecules you created split when they reach the critical size of three atoms, releasing a powerful burst of energy you needed. The energy of split molecules is the number of points you get. When you collect enough energy, you get the next level of atom-smasher. No easy energy for you as atoms are spreading constantly and you have to split them unless they fill the reservoir and the latter explodes.