The two main game modes increase steadily in complexity and difficulty, so the challenge is exactly as it should be. (thatvideogameblog.com)
The missions in all the games, including the original, feel like something out of a secondary mission mode, to accompany a more refined main game mode. (kidfenris.com)
The game features one main game mode only, with access to global leaderboards. (appspy.com)