Tower Defense games like Kingdom Rush typically use long windy roads to give the player time to stop the enemies. Paths are a vital mechanic that paces the gameplay and determine how hard the level is. The more curves the more time the player has. To make the game harder faster enemy types will be introduced to force the player to strategise quicker.
Windy Roads give:
1. Gives the player more time to deploy more defenses.
2. Enemies sustain longer punishment.
3. Slower enemy progression to the HQ.
1. The invading enemy will overcome the paths with faster or units with more HP