Cartoon Network’s newest game is Monsters Ate My Birthday Cake ($5), a puzzle game with lots of RPG elements. The game has a cutesy art style, but don’t let that turn you away — this title has plenty of depth and charm. While the title reminds us of the 16-bit classic Zombies Ate My Neighbors, the gameplay of Monsters Ate My Birthday Cake is like any other number of puzzle games that require players use the abilities of multiple characters…