The goal is to land the ship. You destroy asteroids and satelites in search for crystals that help you upgrade the ship. Upgrades makes surviving a touch-down easier.

CLICK your spaceship to upgrade it. When you active thrusters in the top, use SPACE to use them to soften your landing.  Other controls:
[Mouse Click] Shoot space rubble and satelites!
[Scroll wheel] Zoom in and out

Make sure to land with low velocity, or your ship might not survive the impact!

Music by: https://soundcloud.com/9toes