  Astronomical images can be fascinating to the general public, but the
interaction is typically limited to contemplation. Numerical simulations of
astronomical systems do permit a closer interaction, but are generally unknown
outside the research community. We are developing "Protoplanet Express", a
video game based on hydrodynamical simulations of protoplanetary discs. In the
game, the player visits several discs, finds its relevant features and learns
about them. Here we present the current version of the game, discuss its
reception, and consider its further development.
