Description: Play Sonic the Hedgehog on Cool Math Game Online: Welcome to Sonic the Hedgehog. Help your hero make the adventure and collect all items in the way. Are you ready ? select your hero : Sonic the Hedgehog, Miles 'tails' prower, Knuckles the Echidna, Cream the Rabbit and START !

Instructions: Use the left and right arrow keys to move.
Use SPACE BAR to Jump.
To Pause : Enter
Spindash : hold down, press Space, than release down.

Tags: sonic  ultimate  flash  cool math  collect