Coloris (Bit Generations)

Coloris sees players eliminating colored squares by altering the color of other squares to make them the same color as the squares nearby. The game features two different game modes: clear mode and score mode. In clear mode the player must eliminate a certain number of squares (depending on the difficulty level) before moving on to the next level. In score mode the player must eliminate squares to achieve a high score. Part of the Japanese-only Bit Generations series. Source: Wikipedia, "Bit Generations", available under the CC-BY-SA License.