NANO is an intuitive and addictive puzzle game created by artist / musician Adrian Johnson (Rustcycle). You slide your finger across the screen to "paint" the flow of the particles through the magnetic field. The six different particle types have different behaviors and masses for interacting with the field. Guide benign particles to the spherical Assembler nodes to activate them, and keep malign particles from them. When all nodes are activated, the level is completed.
Adrian writes: I enjoy watching fish. I tend to work too much, and watching fish when I have the chance helps me unwind. There's something meditative about moving one's hand in front of the aquarium and getting the fish to school with you.