You can try to play the popular and well-known game of Sonic. Options are the same as those for the movement, use hotkeys, and to jump - space. When you want the Sonic jumped, he turns into a whirling ball. Use it in order to attack enemies. So you can destroy them. If you touch a enemy in the usual form - you nesdobrovat. Along the way, do not forget to collect the yellow rings. Beware of spikes, retractable from the ground. Come on!