In Tunnel Rush, the speed increase is a defining feature that adds to the game's intensity and challenges players as they progress through the tunnels. Here is a description of the speed increase in the original Tunnel Rush game:

• Gradual Acceleration: In the original Tunnel Rush game, the speed increase is typically gradual but steady. As you navigate through the tunnel and cover more distance, the speed of the game gradually ramps up, adding complexity to the gameplay.
• Incremental Speed Boosts: The speed increase in Tunnel Rush often occurs in incremental boosts. Each boost in speed presents a new level of challenge, requiring players to react more quickly and make split-second decisions to avoid obstacles.
• Triggered by Milestones: Speed increments in the original Tunnel Rush game may be triggered by reaching specific milestones or checkpoints within the game. These milestones serve as indicators for the game to increase the speed and elevate the difficulty level.
• Dynamic Difficulty: The speed increase in Tunnel Rush contributes to the dynamic difficulty of the game. As the speed intensifies, players need to sharpen their reflexes and concentration to keep up with the fast-paced gameplay and survive the increasingly challenging tunnels.
• Enhances Adrenaline Rush: The gradual speed increase in Tunnel Rush enhances the adrenaline rush experienced by players. The sense of urgency and excitement rises as the speed escalates, creating a thrilling gaming experience.