1. Choose your highest number difficulty level with the sliders. 2. Select math operation by clicking on the blue button. 3. Press GO to start game. 4. A math problem will appear. Answer it in the box at the bottom of the screen. Answer it before certain doom! 5. HAVE FUN! 6. To restart double click the green flag.
=) BUG1: Sometimes the meteor explodes as soon as the game is started. Just double click the green flag to restart the game again. BUG2: If you set the highest number to zero and do division, program can not tell if answer is correct or not.