In 25 moves, make all the ghosts disappear. The Tombstone in the bottom will spawn ghosts on every turn. There are 2 ghosts in Iron Gift Traps and the remaining ones trapped in Sticky Cobwebs that will disappear in 4 turns. The best thing you can do to prepare for when the ghosts finally become free. If you can line up the gifts in such a way as to make a single ghost disappear every turn then there shouldn’t be a problem with the new ones since you’ll keep them from spawning.
Since the grid is relatively spacious, a couple of special gifts around the grid can cause a chain reaction that will take care of a lot of ghosts at once. At the same time, be weary of the new ghosts spawning from the Tombstone.