Sonic Labyrinth/Labyrinth of the Sky

Zone 1-1
Zone 1-1 gives you more than enough time to complete the stage, but it's just an introduction to get used to Sonic using the spin-dash to get around.

Key 1
The first key can be found by walking all the way forward. A short spin-dash will do here, but watch out for enemies and other annoying obstacles. Also, behind the key to the left (not Sonic's left, your left) you can find a useful set of flickering triangles. Depending on the color, you'll get a different item. See the items and power-ups page for more information. When you see an orange spring, just walk into it and Sonic will bounce to the next piece of land. Here, there are the last two keys.

Key 2
The second key can be seen inside (or hovering over) an enemy. Spin-dash through the enemy to destroy it and get the key in time. If you don't, the enemy will respawn and you'll have to destroy it again. Try to do a small spin-dash when near it. If you end up going off-course, it'll be a little harder to get back to the key.

Key 3
The last key is very simply scattered to the right. After you obtain all three keys, Sonic will do a little dance. Now you can go to the goal since your exit isn't blocked anymore. Then a little "Congratulations, Zone Complete" screen will pop up, showing your stats (like the kilometers an hour you traveled) and you'll move on to Zone 1-2.