Two-colored capsules fall from the top of the screen and you must rotate and move them to line up with the different colored bugs. When four or more capsules/bugs of the same color are in line, either horizontally or vertically, they disappear and you score points. You complete a level by removing all the bugs. The game includes 25 levels.
Capsule also features a split-screen game for two players on the same computer. The object of the game is to remove all the bugs faster than your opponent.