Complex sentence: Building a maze with Gems and rocks are a key element of the game.The game begins with an empty map with a start, end and 5 to 6 checkpoints (depending on the version of the game), where opposing units maneuver through sequentially.
Split into simpler sentences: Building a maze with Gems and rocks are a key element of the game. An empty map is laid out with a starting, end and 5 to 6 checkpoints (depending on the version of the game) where opposing units will follow through sequentially.