Similar to Qix and JezzBall, Colorfill is a puzzle/arcade game in which you must color at least 80% of the playing field to advance to the next level. You control a cursor, which can be rotated with space bar and extended by clicking the left mouse button. The cursor will extend until it reaches the walls of the playing field, thus filling it with the same color as your cursor. Try to trap enemies for bonus points, but avoid trapping enemies of the same color or they will mutiply.