Trap Cat

A kitty plays around and runs into a grassland by mistake,some unknown guy decides to play a bad joke on this cat,he puts many wood blocks in front of kitty to stop kitty leaving the place. The kitty tries to escape from this place,however,things are not quite easy as it seems to be. If you were the guy,can you successfully trap the cat?

GAME PLAY:
Tap on wood to mark it with cross sign,the cat can not jump on wood with cross sign. Continue doing this until the cat can not move any more. If kitty gets close to the edge,kitty will escape.