Level 13

Difficulty

 * You've got only 450 sun to create your board for revenging with the cats
 * Bear in mind that you can get more sun after beating a certain amount of cats.
 * All in all, it's an easy and funny level.

Strategy

 * For your first stage of revenging, plant many peashooters and wall-nuts to be sure.
 * Secondly, you can plant more plants after beating the first onslaught.