It's a very colorful game with lots of personality, where you play as Classic Sonic in Green Hill. Several chaos emeralds are hidden throughout the map that you can search for, as well as giant rings.

In Sonic Speed Simulator, the codes provide various freebies like Boosters, Pets, and Race Tickets. Notably, Fan Chao and Gratitude Chao Friends come with XP and Gold Ring benefits, thus ...