Lumines II

Typically found in fighting games, combos are a series of strung-together moves.

The concept of moving blocks around to certain areas such as highlighted squares, or switches, or in order to get passed a maze type area. Usually painfully slow and has the character shoving it around with a slow ass animation.

Duality discusses the conflict between two opposite forces and their struggle. Those two forces may also complement each other or are the two sides of a scale and must be balanced.