Culture Green Algae

Algae swim toward light (positive direction) or swims away from light (negative direction). Please change the swimming direction of algae and collect the nutrients (C, N, P, Ca2 ) by turning on or off the light bulbs located at the top, bottom, left, and right of the screen. Three C elements, two N elements, one P element, and one Ca2 element are required to increase one cell number. In addition to above nutrients, star and toxin are displayed on the screen. If algae hit a star, algae reverse its swimming directions: the algae colored green swim toward light while the algae colored light blue swim away from light. Hitting a toxin leads to algal death (Game Over). The resultant number of cells is indicated as the game score.