If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Speed through a canyon in space to blast rocks and collect energy crystals.
Hold left mouse button to move ship and shoot.
Break up glowing rocks to release energy crystals.
You get a bomb for every 20 crystals collected.
Launch a bomb by clicking the button in the lower left corner.
Bombs clear the screen and restore your health.
Levels get harder forever.