Sonic can be controlled using the on-screen directional pad to move left or right, while the jump button allows him to leap. Pressing the jump button again mid-air allows for a double jump to reach higher platforms.

As you progress through the game, you'll find special items and unlockables that enhance Sonic's abilities, such as the Spin Dash. Completing specific levels and finding hidden areas will help you unlock these features.

If you miss a collectible, you can replay the level to collect it. Levels can be accessed from the main menu, allowing you to retrace your steps and explore different paths to find any missed items.

To defeat bosses in Sonic 4™ Episode I, you need to carefully observe their attack patterns and look for openings to strike. Typically, you can jump and hit them when they become vulnerable. Repeat this until their health is depleted.

Special stages can be accessed by collecting enough rings and entering the special ring locations in levels. Once inside, you'll need to navigate through challenging courses to earn Chaos Emeralds, enhancing Sonic's skills.