All of the zones from the games Sonic the hedgehog 1, 2 & 3.
This is for everyone who has fond memories of running around loops faster than the speed of sound, smashing television sets to become invincible and beating up a fat moustachioed evil genius.
If you’d prefer it horizontal rather than vertical, then i’ve made that case available as well.
If you like this design it’s also available as either a T-shirt or a sticker. Also check out my Sonic, Tails & Knuckles sticker set if you’re after something simpler.
All done in Photoshop CS4.