To move the blob, hold a particular area of the map where the blob is placed (or very close to it). This displays a white circle, from which the blob will move away. Blocks inside of the white circle will be pushed out. Note that the blob can split out into multiple little blobs. Pushing smaller blobs away will reduce their size until they reunite into a main blob. To win, you need only one of the blocks of the blob to touch the black hole. The blob is effectively sucked in entirely upon contact with the black hole, regardless if it is united as one blob or dispersed as many.