20 moves to light up 3 pumpkins. Even if the main objective are the pumpkins, 2 of them are blocked off by ghosts. And since the ghosts can take over entire parts of the grid, our priority should be reaching those two side pumpkins while destroying ghosts in the process.
However, there’s something interesting in the positioning of the pumpkins. Remember that explosions can light them up as well as a match. A strategically placed combination of gifts can light up all 3 of the pumpkins at the same time. If you manage to stack up a striped gift and a gift bag somewhere in the lower columns, then the explosion will rush through the four directions of the grid, and the objective will be completed at once.