When you begin in the game, you will have 10 drops of green goo in your tank. Use these drops wisely to grow blobs until they end up bursting. Aim for creating combos that cause chain reactions, which will in turn earn you more drops to use. You don't get more drops of goo between levels, so it's an endurance match to see how long you can last. It will definitely take some careful planning if you want to make your way up through the levels, figuring out the shortest number of moves to win a level will be absolutely essential. Click on a blob to grow it, and then once they're fully formed, round and big, click again and they burst apart, potentially causing a chain reaction with other blobs that are within the path. A truly challenging game that will keep fans of puzzle games occupied for many, many hours on end.