Atomaniac is a remake of the C64 and Amiga game Atomino. Connect different colored spheres called "atoms", each color having a different number of connections, so that there are no free connections. A group of atoms with no free connections - called a "molecule" - disappears from the game, leaving room for more atoms.
In endless mode, each molecule built earns you a score depending on the size of the molecule.
In challenge mode, the goal is to build one or more molecules of a specific size.