In the vibrant world of this engaging puzzle game, your mission is to eradicate all viruses using color-coordinated capsules. The game board is filled with viruses in three distinct colors: red, yellow, and blue. As a player, you have the power to maneuver each falling capsule, shifting it left or right and rotating it to align perfectly with the viruses and any capsules already in place. The key to success is forming alignments of four or more capsule halves or viruses of the same color, either vertically or horizontally, which will then be cleared from the board. Your ultimate goal is to progress through levels by completely eliminating all viruses from the playing field. Be cautious, though; a game over is triggered if capsules pile up to the point of blocking the bottle's narrow neck.

You have the flexibility to choose your starting difficulty whenever you begin a new game. You can select an initial level ranging from zero to twenty, which sets the number of viruses you need to clear. Additionally, there are three speed settings that determine how quickly the capsules descend into the bottle. Your score is calculated based on the viruses you eliminate, not on the time it takes to finish the level or the number of capsules you use. If you conquer the highest difficulty level, you can keep playing to boost your score, although the number of viruses to clear will stay constant. You earn extra points for eliminating multiple viruses simultaneously, but there's no bonus for triggering chain reactions where one elimination leads to another. Remember, the game's speed also affects your score; faster speeds lead to higher points.