The names of several iPad games have slipped through the cracks – apparently pushed live to the App Store prematurely (the iPad isn’t released in the United States until April 3rd). The names include ones we’ve already heard about, such as Flight Control HD from Firemint, along with other pleasant surprises, like Worms HD and Plants vs. Zombies HD. Labyrinth HD also is a natural fit – its iPhone predecessor is one of the surefire ways to convince non-iPhone users that its accelerometer is cool for games. I already own Plants vs. Zombies for my Mac and iPhone, and I’m looking forward to buying it again for my iPad.