The scene - the heart of a runaway nuclear reactor. To delay meltdown you must shoot the protons with your remote controlled super laser. Each time that you shoot a proton, an extra electron is released. If you shoot an electron, you speed up the impending meltdown. There are nine skill levels.

The game starts with a blue electron moving around the neutron.

To delay meltdown you must shoot the proton which moves around the purple nucleus, with your remote controlled super laser.

Each time that you shoot the proton, an extra electron appears. If you collide with an electron, you lose one of your three lives. If you shoot an electron, everything speeds up for a short time, until the electrons cool down a little. If you delay in shooting the proton, meltdown starts.

The molten debris approach the nucleus from each side. You can blast the debris away, but the only way that you can stop it from advancing, is to keep shooting the proton.

When selecting a skill level, 1 is easiest, 9 is hardest.

Points are awarded for the time that you survive, i.e. the longer that you survive, the higher the score.

You have three lives.

Z - Left, X - Right, : - Up, / - Down, RETURN - Fire

A joystick option is also available.
P - Pause/Continue, Q/W - Sound off/on