Zoop is a fast-paced puzzle game in which the player eliminates colored shapes that are approaching his alter ego, another colored shape, before they reach the top, somewhat similarly to Tetris. The goal is to clear lines of matching colors without the other shapes reaching the top.
The gameplay involves moving and firing pieces at the incoming shapes. If a piece matches the color of the target shape, it is eliminated along with all similar colors behind it. However, if a piece hits a different colored shape or a line of matching colors, its color changes.