To start a new game you have to choose your desired bet stake and click the start button. After 2 seconds asteroids will start approaching you from the right side of the screen in a random order.
You now have to avoid getting hit by the asteroids by either moving the rocket using the arrow keys or by shooting at them by clicking the left mouse button.
Collecting a blue gemstone will add 1 to your score, collecting a green adds 2 to your score, collecting a red adds 3 to your score. Collecting hearts will heal you and give you a life, collecting a shield will make you indestructible for 10 seconds and asteroids will not be able to hit you.
If you manage to collect 24 gemstones you will win the game. If the 60 seconds time runs out before you have collected 24 gemstones or if you loose all your lives the game ends and you loose your bet stake.
For more details visit: www.gem24.cc/gameguide.html