In Abstracta - Sonic Version your goal is to help sonic collect gems and rings while avoiding the badniks. Although there is a warning that you must be aware of. At each checkpoint the speed of the game picks up. To move Sonic just move your mouse across the screen in the direction you wish for him to go. Keep an eye on your lives up in the left hand corner. If you run out of lives its game over. At the bottom of the screen it shows what color crystals you have picked up so far. It will also show you the speed at which the game is moving so you are able to keep track of it.