The direction key controls the emitter's left and right directions, the space bar launches bubbles, after launching bubbles if there are three or more of the same color bubbles connected, can eliminate these bubbles and score... Very lovely painting style, good game. Maya,bubble shooter,puzzle game,color matching,bubble game,arcade game,1 player,easy to play,addictive game,colorful levels,strategic gameplay,point scoring,relaxation,game,adult,visual appeal