Inferno requires Mac os X or Windows XP/Vista. There is no installation required to run Inferno. Just click on the application and it should start. To use the score board you must be connected to the internet. Under a certain circumstance Inferno may create a file with a .level extension. This is a non-essential game data file. There is no spyware or addware bundled or installed with Inferno. Move the devil left and right using the left and right arrow keys. Jump by pressing spacebar. Collect all of the coins on a level to open the gate to the next level. If you fall too far you will die. Dying will send you back to the beginning of the current level. Press escape to pause the game and return to the menu.