About Magneto-Mapper

Earth's magnetosphere really does deflect charged solar particles the way this tower-defense game asks you to — the Lorentz force bends a moving charge's path perpendicular to both its velocity and the magnetic field, which is exactly what keeps most solar wind from ever reaching the surface.

Difficulty scales with the real NOAA Kp index, the same 0-9 scale space-weather forecasters use to rate geomagnetic storm strength — a high Kp day in this game means a genuinely rougher day for satellites and power grids in real life too.