Tunnel Rush is designed as an endless runner with no traditional checkpoints. Once a player crashes into an obstacle, the run ends, and they must restart from the beginning. The absence of checkpoints is a core feature of the game’s design, emphasizing its high-stakes, all-or-nothing gameplay. However, some versions of the game include a "white line" milestone, often referred to as a significant marker in the sky, which grants bonus points but does not function as a save point.
The lack of checkpoints fuels the game’s replayability, as players are motivated to improve their skills and survive longer with each attempt. The instant restart option mitigates frustration by allowing players to jump back into the action immediately, maintaining momentum and encouraging persistence.