Nanobeast is a retro shooter featuring horizontal and vertical scrolling stages. Destroy enemy ships by shooting at them or using your bombs. Pick up the green diamonds that some enemies drop to gain upgrade points. You have five power-ups shown at the top of the screen; speed, power, fire rate, bombs and lives. Depending on how many upgrade points you have, you will be able to upgrade one of these power-ups. The power-up that you can upgrade is shown in green.