From Sonic Retro
Scattered around the levels of any given Sonic game are various level objects. These are the items which don't automatically stay with the character, but remain interactive in some way. They can be unique or numerous within their relevant level, game, or even the whole franchise, but they all have significance for helping (or hindering) your progress.
Pages in category "Level objects"
The following 27 pages are in this category, out of 27 total.