Understanding Sonic's movement is paramount. The primary controls are simple yet require practice for mastery. Use the D-Pad (or Left Analog Stick) to move Sonic left and right. Press the A, B, or C Button (or equivalent on modern controllers) to make Sonic jump. Holding down the jump button while moving will allow Sonic to perform a Spin Dash, which is essential for gaining speed and breaking through certain obstacles.
To perform a Spin Dash, hold down and press the jump button repeatedly. Sonic will curl into a ball and rev up. Release the D-Pad to launch forward at high speed. This move is invaluable for clearing gaps, destroying enemies, and accessing secret areas. Remember, the longer you hold and press the jump button, the faster Sonic will launch. Practice this move in the early stages to get a feel for its power and timing.